Simplify the magic required to create IPC message headers a bit.

chrome/common/automation_messages_internal.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Defines the IPC messages used by the automation interface.
 
-// This header is meant to be included in multiple passes, hence no traditional
-// header guard.
-// See ipc_message_macros.h for explanation of the macros and passes.
-
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/navigation_types.h"
 #include "chrome/test/automation/autocomplete_edit_proxy.h"
 #include "gfx/point.h"
 #include "gfx/rect.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_macros.h"
 #include "net/url_request/url_request_status.h"
 
 // NOTE: All IPC messages have either a routing_id of 0 (for asynchronous
 //       messages), or one that's been assigned by the proxy (for calls
 //       which expect a response).  The routing_id shouldn't be used for
 //       any other purpose in these message types.
 
-// NOTE: All the new IPC messages should go at the end (before IPC_END_MESSAGES)
-//       The IPC message IDs are part of an enum and hence the value
-//       assumed to be constant across the builds may change.
-//       The messages AutomationMsg_WindowHWND* in particular should not change
-//       since the PageCyclerReferenceTest depends on the correctness of the
-//       message IDs across the builds.
-
-IPC_BEGIN_MESSAGES(Automation)
-
-  // This message is fired when the AutomationProvider is up and running
-  // in the app (the app is not fully up at this point). The parameter to this
-  // message is the version string of the automation provider. This parameter
-  // is defined to be the version string as returned by
-  // chrome::VersionInfo::Version().
-  // The client can choose to use this version string to decide whether or not
-  // it can talk to the provider.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_Hello, std::string)
-
-  // This message is fired when the initial tab(s) are finished loading.
-  IPC_MESSAGE_ROUTED0(AutomationMsg_InitialLoadsComplete)
-
-  // This message notifies the AutomationProvider to append a new tab the
-  // window with the given handle. The return value contains the index of
-  // the new tab, or -1 if the request failed.
-  // The second parameter is the url to be loaded in the new tab.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_AppendTab, int, GURL, int)
-
-  // This message requests the (zero-based) index for the currently
-  // active tab in the window with the given handle. The return value contains
-  // the index of the active tab, or -1 if the request failed.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ActiveTabIndex, int, int)
-
-  // This message notifies the AutomationProvider to active the tab.
-  // The first parameter is the handle to window resource.
-  // The second parameter is the (zero-based) index to be activated
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_ActivateTab, int, int, int)
-
-  // This message requests the cookie value for given url in the
-  // profile of the tab identified by the second parameter.  The first
-  // parameter is the URL string. The response contains the length of the
-  // cookie value string. On failure, this length = -1.
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_GetCookies, GURL, int,
-                             int, std::string)
-
-  // This message notifies the AutomationProvider to set and broadcast a cookie
-  // with given name and value for the given url in the profile of the tab
-  // identified by the third parameter. The first parameter is the URL
-  // string, and the second parameter is the cookie name and value to be set.
-  // The return value is a non-negative value on success.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetCookie, GURL, std::string,
-                             int, int)
-
-  // This message notifies the AutomationProvider to navigate to a specified
-  // url in the tab with given handle. The first parameter is the handle to
-  // the tab resource. The second parameter is the target url.  The return
-  // value contains a status code which is nonnegative on success.
-  // See AutomationMsg_NavigationResponseValues for the return value.
-  //
-  // Deprecated in favor of
-  // AutomationMsg_NavigateToURLBlockUntilNavigationsComplete.
-  // TODO(phajdan.jr): Remove when the reference build gets updated.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigateToURL, int, GURL,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message is used to implement the asynchronous version of
-  // NavigateToURL.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigationAsync,
-                             int /* tab handle */,
-                             GURL,
-                             bool /* result */)
-
-  // This message notifies the AutomationProvider to navigate back in session
-  // history in the tab with given handle. The first parameter is the handle
-  // to the tab resource.
-  // See AutomationMsg_NavigationResponseValues for the navigation response
-  // values.
-  //
-  // Deprecated in favor of AutomationMsg_GoBackBlockUntilNavigationsComplete.
-  // TODO(phajdan.jr): Remove when the reference build gets updated.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GoBack, int,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message notifies the AutomationProvider to navigate forward in session
-  // history in the tab with given handle. The first parameter is the handle
-  // to the tab resource.
-  // See AutomationMsg_NavigationResponseValues for the navigation response
-  // values.
-  //
-  // Deprecated in favor of
-  // AutomationMsg_GoForwardBlockUntilNavigationsComplete.
-  // TODO(phajdan.jr): Remove when the reference build gets updated.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GoForward, int,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message requests the number of browser windows that the app currently
-  // has open.  The return value is the number of windows.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_BrowserWindowCount, int)
-
-  // This message requests the handle (int64 app-unique identifier) of the
-  // window with the given (zero-based) index.  On error, the returned handle
-  // value is 0.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_BrowserWindow, int, int)
-
-  // This message requests the number of tabs in the window with the given
-  // handle.  The return value contains the number of tabs, or -1 if the
-  // request failed.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabCount, int, int)
-
-  // This message requests the handle of the tab with the given (zero-based)
-  // index in the given app window. First parameter specifies the given window
-  // handle, second specifies the given tab_index. On error, the returned handle
-  // value is 0.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_Tab, int, int, int)
-
-  // This message requests the the title of the tab with the given handle.
-  // The return value contains the size of the title string. On error, this
-  // value should be -1 and empty string. Note that the title can be empty in
-  // which case the size would be 0.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_TabTitle,
-                             int,
-                             int,
-                             std::wstring)
-
-  // This message requests the url of the tab with the given handle.
-  // The return value contains a success flag and the URL string. The URL will
-  // be empty on failure, and it still may be empty on success.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_TabURL,
-                             int /* tab handle */,
-                             bool /* success flag */,
-                             GURL)
+// NOTE: All the new IPC messages should go at the end
+//       The IPC message IDs need to match the reference builds.  Since right
+//       now we define the IDs based on __LINE__, you can't change the line
+//       numbers of existing messages.  This will be fixed when Xcode supports
+//       __COUNTER__, and we can switch the IPC macros to use it.
+
+#define IPC_MESSAGE_START AutomationMsgStart
+
+// This message is fired when the AutomationProvider is up and running
+// in the app (the app is not fully up at this point). The parameter to this
+// message is the version string of the automation provider. This parameter
+// is defined to be the version string as returned by
+// chrome::VersionInfo::Version().
+// The client can choose to use this version string to decide whether or not
+// it can talk to the provider.
+IPC_MESSAGE_ROUTED1(AutomationMsg_Hello, std::string)
+
+// This message is fired when the initial tab(s) are finished loading.
+IPC_MESSAGE_ROUTED0(AutomationMsg_InitialLoadsComplete)
+
+// This message notifies the AutomationProvider to append a new tab the
+// window with the given handle. The return value contains the index of
+// the new tab, or -1 if the request failed.
+// The second parameter is the url to be loaded in the new tab.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_AppendTab, int, GURL, int)
+
+// This message requests the (zero-based) index for the currently
+// active tab in the window with the given handle. The return value contains
+// the index of the active tab, or -1 if the request failed.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ActiveTabIndex, int, int)
+
+// This message notifies the AutomationProvider to active the tab.
+// The first parameter is the handle to window resource.
+// The second parameter is the (zero-based) index to be activated
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_ActivateTab, int, int, int)
+
+// This message requests the cookie value for given url in the
+// profile of the tab identified by the second parameter.  The first
+// parameter is the URL string. The response contains the length of the
+// cookie value string. On failure, this length = -1.
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_GetCookies, GURL, int,
+                           int, std::string)
+
+// This message notifies the AutomationProvider to set and broadcast a cookie
+// with given name and value for the given url in the profile of the tab
+// identified by the third parameter. The first parameter is the URL
+// string, and the second parameter is the cookie name and value to be set.
+// The return value is a non-negative value on success.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetCookie, GURL, std::string,
+                           int, int)
+
+// This message notifies the AutomationProvider to navigate to a specified
+// url in the tab with given handle. The first parameter is the handle to
+// the tab resource. The second parameter is the target url.  The return
+// value contains a status code which is nonnegative on success.
+// See AutomationMsg_NavigationResponseValues for the return value.
+//
+// Deprecated in favor of
+// AutomationMsg_NavigateToURLBlockUntilNavigationsComplete.
+// TODO(phajdan.jr): Remove when the reference build gets updated.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigateToURL, int, GURL,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message is used to implement the asynchronous version of
+// NavigateToURL.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigationAsync,
+                           int /* tab handle */,
+                           GURL,
+                           bool /* result */)
+
+// This message notifies the AutomationProvider to navigate back in session
+// history in the tab with given handle. The first parameter is the handle
+// to the tab resource.
+// See AutomationMsg_NavigationResponseValues for the navigation response
+// values.
+//
+// Deprecated in favor of AutomationMsg_GoBackBlockUntilNavigationsComplete.
+// TODO(phajdan.jr): Remove when the reference build gets updated.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GoBack, int,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message notifies the AutomationProvider to navigate forward in session
+// history in the tab with given handle. The first parameter is the handle
+// to the tab resource.
+// See AutomationMsg_NavigationResponseValues for the navigation response
+// values.
+//
+// Deprecated in favor of
+// AutomationMsg_GoForwardBlockUntilNavigationsComplete.
+// TODO(phajdan.jr): Remove when the reference build gets updated.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GoForward, int,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message requests the number of browser windows that the app currently
+// has open.  The return value is the number of windows.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_BrowserWindowCount, int)
+
+// This message requests the handle (int64 app-unique identifier) of the
+// window with the given (zero-based) index.  On error, the returned handle
+// value is 0.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_BrowserWindow, int, int)
+
+// This message requests the number of tabs in the window with the given
+// handle.  The return value contains the number of tabs, or -1 if the
+// request failed.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabCount, int, int)
+
+// This message requests the handle of the tab with the given (zero-based)
+// index in the given app window. First parameter specifies the given window
+// handle, second specifies the given tab_index. On error, the returned handle
+// value is 0.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_Tab, int, int, int)
+
+// This message requests the the title of the tab with the given handle.
+// The return value contains the size of the title string. On error, this
+// value should be -1 and empty string. Note that the title can be empty in
+// which case the size would be 0.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_TabTitle,
+                           int,
+                           int,
+                           std::wstring)
+
+// This message requests the url of the tab with the given handle.
+// The return value contains a success flag and the URL string. The URL will
+// be empty on failure, and it still may be empty on success.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_TabURL,
+                           int /* tab handle */,
+                           bool /* success flag */,
+                           GURL)
+
+// This message notifies the AutomationProxy that a handle that it has
+// previously been given is now invalid.  (For instance, if the handle
+// represented a window which has now been closed.)  The parameter
+// value is the handle.
+IPC_MESSAGE_ROUTED1(AutomationMsg_InvalidateHandle, int)
+
+// This message notifies the AutomationProvider that a handle is no
+// longer being used, so it can stop paying attention to the
+// associated resource.  The parameter value is the handle.
+IPC_MESSAGE_ROUTED1(AutomationMsg_HandleUnused, int)
+
+// This message tells the AutomationProvider to provide the given
+// authentication data to the specified tab, in response to an HTTP/FTP
+// authentication challenge.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetAuth,
+                           int,  // tab handle
+                           std::wstring,  // username
+                           std::wstring,  // password
+                           AutomationMsg_NavigationResponseValues)  // status
+
+// This message tells the AutomationProvider to cancel the login in the
+// specified tab.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_CancelAuth,
+                           int,  // tab handle
+                           AutomationMsg_NavigationResponseValues)  // status
+
+// Requests that the automation provider ask history for the most recent
+// chain of redirects coming from the given URL. The response must be
+// decoded by the caller manually; it contains an integer indicating the
+// number of URLs, followed by that many wstrings indicating a chain of
+// redirects. On failure, the count will be negative.
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_RedirectsFrom,
+                           int,   // tab handle
+                           GURL,  // source URL
+                           bool /* succeeded */,
+                           std::vector<GURL> /* redirects */)
+
+// This message asks the AutomationProvider whether a tab is waiting for
+// login info.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_NeedsAuth,
+                           int,   // tab handle
+                           bool)  // status
+
+// This message requests the AutomationProvider to apply a certain
+// accelerator. It is completely asynchronous with the resulting accelerator
+// action.
+IPC_SYNC_MESSAGE_ROUTED2_0(AutomationMsg_ApplyAccelerator,
+                           int,  // window handle
+                           int)  // accelerator id like (IDC_BACK,
+                                 //  IDC_FORWARD, etc)
+                                 // The list can be found at
+                                 // chrome/app/chrome_command_ids.h
+
+// This message requests that the AutomationProvider executes a JavaScript,
+// which is sent embedded in a 'javascript:' URL.
+// The javascript is executed in context of child frame whose xpath
+// is passed as parameter (context_frame). The execution results in
+// a serialized JSON string response.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_DomOperation,
+                           int,           // tab handle
+                           std::wstring,  // context_frame
+                           std::wstring,  // the javascript to be executed
+                           std::string)   // the serialized json string
+                                          // containing the result of a
+                                          // javascript execution
+
+// Is the Download Shelf visible for the specified browser?
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ShelfVisibility,
+                           int /* browser_handle */,
+                           bool /* is_visible */)
+
+// This message requests the number of constrained windows in the tab with
+// the given handle.  The return value contains the number of constrained
+// windows, or -1 if the request failed.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ConstrainedWindowCount,
+                           int /* tab_handle */,
+                           int /* constrained_window_count */)
+
+// This message requests the bounds of the specified View element in
+// window coordinates.
+// Request:
+//   int - the handle of the window in which the view appears
+//   int - the ID of the view, as specified in chrome/browser/ui/view_ids.h
+//   bool - whether the bounds should be returned in the screen coordinates
+//          (if true) or in the browser coordinates (if false).
+// Response:
+//   bool - true if the view was found
+//   gfx::Rect - the bounds of the view, in window coordinates
+IPC_SYNC_MESSAGE_ROUTED3_2(AutomationMsg_WindowViewBounds, int, int,
+                           bool, bool, gfx::Rect)
+
+// This message sets the bounds of the window.
+// Request:
+//   int - the handle of the window to resize
+//   gfx::Rect - the bounds of the window
+// Response:
+//   bool - true if the resize was successful
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_SetWindowBounds, int, gfx::Rect,
+                           bool)
 
 #if defined(OS_WIN)
-  // TODO(estade): delete this unused message.
-  IPC_SYNC_MESSAGE_ROUTED0_0(AutomationMsg_WindowHWND)
-
-  // This message requests the HWND of the tab that corresponds
-  // to the given automation handle.
-  // The return value contains the HWND value, which is 0 if the call fails.
-  //
-  // TODO(estade): The only test that uses this message is
-  // NPAPIVisiblePluginTester.SelfDeletePluginInvokeInSynchronousMouseMove. It
-  // can probably be done in another way, and this can be removed.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabHWND,
-                             int /* tab_handle */,
-                             HWND /* win32 Window Handle */)
+// TODO(port): Port these messages.
+//
+// This message requests that a drag be performed in window coordinate space
+// Request:
+//   int - the handle of the window that's the context for this drag
+//   std::vector<gfx::Point> - the path of the drag in window coordinate
+//                             space; it should have at least 2 points
+//                             (start and end)
+//   int - the flags which identify the mouse button(s) for the drag, as
+//         defined in chrome/views/event.h
+// Response:
+//   bool - true if the drag could be performed
+IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_WindowDrag,
+                           int, std::vector<gfx::Point>, int, bool, bool)
 #endif  // defined(OS_WIN)
 
-  // This message notifies the AutomationProxy that a handle that it has
-  // previously been given is now invalid.  (For instance, if the handle
-  // represented a window which has now been closed.)  The parameter
-  // value is the handle.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_InvalidateHandle, int)
-
-  // This message notifies the AutomationProvider that a handle is no
-  // longer being used, so it can stop paying attention to the
-  // associated resource.  The parameter value is the handle.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_HandleUnused, int)
-
-  // This message tells the AutomationProvider to provide the given
-  // authentication data to the specified tab, in response to an HTTP/FTP
-  // authentication challenge.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetAuth,
-                             int,  // tab handle
-                             std::wstring,  // username
-                             std::wstring,  // password
-                             AutomationMsg_NavigationResponseValues)  // status
-
-  // This message tells the AutomationProvider to cancel the login in the
-  // specified tab.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_CancelAuth,
-                             int,  // tab handle
-                             AutomationMsg_NavigationResponseValues)  // status
-
-  // Requests that the automation provider ask history for the most recent
-  // chain of redirects coming from the given URL. The response must be
-  // decoded by the caller manually; it contains an integer indicating the
-  // number of URLs, followed by that many wstrings indicating a chain of
-  // redirects. On failure, the count will be negative.
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_RedirectsFrom,
-                             int,   // tab handle
-                             GURL,  // source URL
-                             bool /* succeeded */,
-                             std::vector<GURL> /* redirects */)
-
-  // This message asks the AutomationProvider whether a tab is waiting for
-  // login info.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_NeedsAuth,
-                             int,   // tab handle
-                             bool)  // status
-
-  // This message requests the AutomationProvider to apply a certain
-  // accelerator. It is completely asynchronous with the resulting accelerator
-  // action.
-  IPC_SYNC_MESSAGE_ROUTED2_0(AutomationMsg_ApplyAccelerator,
-                             int,  // window handle
-                             int)  // accelerator id like (IDC_BACK,
-                                   //  IDC_FORWARD, etc)
-                                   // The list can be found at
-                                   // chrome/app/chrome_command_ids.h
-
-  // This message requests that the AutomationProvider executes a JavaScript,
-  // which is sent embedded in a 'javascript:' URL.
-  // The javascript is executed in context of child frame whose xpath
-  // is passed as parameter (context_frame). The execution results in
-  // a serialized JSON string response.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_DomOperation,
-                             int,           // tab handle
-                             std::wstring,  // context_frame
-                             std::wstring,  // the javascript to be executed
-                             std::string)   // the serialized json string
-                                            // containing the result of a
-                                            // javascript execution
-
-  // Is the Download Shelf visible for the specified browser?
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ShelfVisibility,
-                             int /* browser_handle */,
-                             bool /* is_visible */)
-
-  // This message requests the number of constrained windows in the tab with
-  // the given handle.  The return value contains the number of constrained
-  // windows, or -1 if the request failed.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ConstrainedWindowCount,
-                             int /* tab_handle */,
-                             int /* constrained_window_count */)
-
-  // This message requests the bounds of the specified View element in
-  // window coordinates.
-  // Request:
-  //   int - the handle of the window in which the view appears
-  //   int - the ID of the view, as specified in chrome/browser/ui/view_ids.h
-  //   bool - whether the bounds should be returned in the screen coordinates
-  //          (if true) or in the browser coordinates (if false).
-  // Response:
-  //   bool - true if the view was found
-  //   gfx::Rect - the bounds of the view, in window coordinates
-  IPC_SYNC_MESSAGE_ROUTED3_2(AutomationMsg_WindowViewBounds, int, int,
-                             bool, bool, gfx::Rect)
-
-  // This message sets the bounds of the window.
-  // Request:
-  //   int - the handle of the window to resize
-  //   gfx::Rect - the bounds of the window
-  // Response:
-  //   bool - true if the resize was successful
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_SetWindowBounds, int, gfx::Rect,
-                             bool)
+// Similar to AutomationMsg_InitialLoadsComplete, this indicates that the
+// new tab ui has completed the initial load of its data.
+// Time is how many milliseconds the load took.
+IPC_MESSAGE_ROUTED1(AutomationMsg_InitialNewTabUILoadComplete,
+                    int /* time */)
+
+// This message starts a find within a tab corresponding to the supplied
+// tab handle. The return value contains the number of matches found on the
+// page within the tab specified. The parameter 'search_string' specifies
+// what string to search for, 'forward' specifies whether to search in
+// forward direction (1=forward, 0=back), 'match_case' specifies case
+// sensitivity
+// (1=case sensitive, 0=case insensitive). If an error occurs, matches_found
+// will be -1.
+//
+// NOTE: This message has been deprecated, please use the new message
+// AutomationMsg_Find below.
+//
+IPC_SYNC_MESSAGE_ROUTED4_2(AutomationMsg_FindInPage,   // DEPRECATED.
+                           int, /* tab_handle */
+                           std::wstring, /* find_request */
+                           int, /* forward */
+                           int /* match_case */,
+                           int /* active_ordinal */,
+                           int /* matches_found */)
+
+// This message sends a inspect element request for a given tab. The response
+// contains the number of resources loaded by the inspector controller.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_InspectElement,
+                           int, /* tab_handle */
+                           int, /* x */
+                           int  /* y */,
+                           int)
+
+// This message requests the process ID of the tab that corresponds
+// to the given automation handle.
+// The return value has an integer corresponding to the PID of the tab's
+// renderer, 0 if the tab currently has no renderer process, or -1 on error.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabProcessID,
+                           int /* tab_handle */,
+                           int /* process ID */)
+
+// This tells the browser to enable or disable the filtered network layer.
+IPC_MESSAGE_ROUTED1(AutomationMsg_SetFilteredInet,
+                    bool /* enabled */)
+
+// Gets the directory that downloads will occur in for the active profile.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_DownloadDirectory,
+                           int /* tab_handle */,
+                           FilePath /* directory */)
+
+// This message requests the id of the view that has the focus in the
+// specified window. If no view is focused, -1 is returned.  Note that the
+// window should either be a ViewWindow or a Browser.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetFocusedViewID,
+                           int /* view_handle */,
+                           int /* focused_view_id */)
+
+// This message shows/hides the window.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_SetWindowVisible,
+                           int /* view_handle */,
+                           bool /* visible */,
+                           bool /* success */)
+
+// Gets the active status of a window.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_IsWindowActive,
+                           int /* view_handle */,
+                           bool /* success */,
+                           bool /* active */)
+
+// Makes the specified window the active window.
+IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_ActivateWindow,
+                           int /* view_handle */)
+
+// Opens a new browser window.
+// TODO(sky): remove this and replace with OpenNewBrowserWindowOfType.
+// Doing this requires updating the reference build.
+IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_OpenNewBrowserWindow,
+                           bool /* show */ )
+
+// This message requests the handle (int64 app-unique identifier) of the
+// current active top window.  On error, the returned handle value is 0.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_ActiveWindow, int)
+
+// This message requests the browser associated with the specified window
+// handle.
+// The return value contains a success flag and the handle of the browser.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_BrowserForWindow,
+                           int /* window handle */,
+                           bool /* success flag */,
+                           int /* browser handle */)
+
+// This message requests the window associated with the specified browser
+// handle.
+// The return value contains a success flag and the handle of the window.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_WindowForBrowser,
+                           int /* browser handle */,
+                           bool /* success flag */,
+                           int /* window handle */)
+
+// This message requests the AutocompleteEdit associated with the specified
+// browser handle.
+// The return value contains a success flag and the handle of the omnibox.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_AutocompleteEditForBrowser,
+                           int /* browser handle */,
+                           bool /* success flag */,
+                           int /* AutocompleteEdit handle */)
 
 #if defined(OS_WIN)
-  // TODO(port): Port these messages.
-  //
-  // This message requests that a drag be performed in window coordinate space
-  // Request:
-  //   int - the handle of the window that's the context for this drag
-  //   std::vector<gfx::Point> - the path of the drag in window coordinate
-  //                             space; it should have at least 2 points
-  //                             (start and end)
-  //   int - the flags which identify the mouse button(s) for the drag, as
-  //         defined in chrome/views/event.h
-  // Response:
-  //   bool - true if the drag could be performed
-  IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_WindowDrag,
-                             int, std::vector<gfx::Point>, int, bool, bool)
+// TODO(estade): This message is defined later on for Mac and Linux. This is
+// to avoid adding a new IPC in the middle for those platforms (see comment
+// at top). The message is exactly the same, so they should be remerged when
+// all messages in this file have been made cross-platform (at which point we
+// will need to check in new reference builds).
+//
+// This message requests that a mouse click be performed in window coordinate
+// space.
+// Request:
+//   int - the handle of the window that's the context for this click
+//   gfx::Point - the point to click
+//   int - the flags which identify the mouse button(s) for the click, as
+//       defined in chrome/views/event.h
+IPC_MESSAGE_ROUTED3(AutomationMsg_WindowClick, int, gfx::Point, int)
 #endif  // defined(OS_WIN)
 
-  // Similar to AutomationMsg_InitialLoadsComplete, this indicates that the
-  // new tab ui has completed the initial load of its data.
-  // Time is how many milliseconds the load took.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_InitialNewTabUILoadComplete,
-                      int /* time */)
-
-  // This message starts a find within a tab corresponding to the supplied
-  // tab handle. The return value contains the number of matches found on the
-  // page within the tab specified. The parameter 'search_string' specifies
-  // what string to search for, 'forward' specifies whether to search in
-  // forward direction (1=forward, 0=back), 'match_case' specifies case
-  // sensitivity
-  // (1=case sensitive, 0=case insensitive). If an error occurs, matches_found
-  // will be -1.
-  //
-  // NOTE: This message has been deprecated, please use the new message
-  // AutomationMsg_Find below.
-  //
-  IPC_SYNC_MESSAGE_ROUTED4_2(AutomationMsg_FindInPage,   // DEPRECATED.
-                             int, /* tab_handle */
-                             std::wstring, /* find_request */
-                             int, /* forward */
-                             int /* match_case */,
-                             int /* active_ordinal */,
-                             int /* matches_found */)
-
-  // This message sends a inspect element request for a given tab. The response
-  // contains the number of resources loaded by the inspector controller.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_InspectElement,
-                             int, /* tab_handle */
-                             int, /* x */
-                             int  /* y */,
-                             int)
-
-  // This message requests the process ID of the tab that corresponds
-  // to the given automation handle.
-  // The return value has an integer corresponding to the PID of the tab's
-  // renderer, 0 if the tab currently has no renderer process, or -1 on error.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabProcessID,
-                             int /* tab_handle */,
-                             int /* process ID */)
-
-  // This tells the browser to enable or disable the filtered network layer.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_SetFilteredInet,
-                      bool /* enabled */)
-
-  // Gets the directory that downloads will occur in for the active profile.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_DownloadDirectory,
-                             int /* tab_handle */,
-                             FilePath /* directory */)
-
-  // This message requests the id of the view that has the focus in the
-  // specified window. If no view is focused, -1 is returned.  Note that the
-  // window should either be a ViewWindow or a Browser.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetFocusedViewID,
-                             int /* view_handle */,
-                             int /* focused_view_id */)
-
-  // This message shows/hides the window.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_SetWindowVisible,
-                             int /* view_handle */,
-                             bool /* visible */,
-                             bool /* success */)
-
-  // Gets the active status of a window.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_IsWindowActive,
-                             int /* view_handle */,
-                             bool /* success */,
-                             bool /* active */)
-
-  // Makes the specified window the active window.
-  IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_ActivateWindow,
-                             int /* view_handle */)
-
-  // Opens a new browser window.
-  // TODO(sky): remove this and replace with OpenNewBrowserWindowOfType.
-  // Doing this requires updating the reference build.
-  IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_OpenNewBrowserWindow,
-                             bool /* show */ )
-
-  // This message requests the handle (int64 app-unique identifier) of the
-  // current active top window.  On error, the returned handle value is 0.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_ActiveWindow, int)
-
-  // This message requests the browser associated with the specified window
-  // handle.
-  // The return value contains a success flag and the handle of the browser.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_BrowserForWindow,
-                             int /* window handle */,
-                             bool /* success flag */,
-                             int /* browser handle */)
-
-  // This message requests the window associated with the specified browser
-  // handle.
-  // The return value contains a success flag and the handle of the window.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_WindowForBrowser,
-                             int /* browser handle */,
-                             bool /* success flag */,
-                             int /* window handle */)
-
-  // This message requests the AutocompleteEdit associated with the specified
-  // browser handle.
-  // The return value contains a success flag and the handle of the omnibox.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_AutocompleteEditForBrowser,
-                             int /* browser handle */,
-                             bool /* success flag */,
-                             int /* AutocompleteEdit handle */)
+// This message requests that a key press be performed.
+// Request:
+//   int - the handle of the window that's the context for this click
+//   int - the app::KeyboardCode of the key that was pressed.
+//   int - the flags which identify the modifiers (shift, ctrl, alt)
+//         associated for, as defined in chrome/views/event.h
+IPC_MESSAGE_ROUTED3(AutomationMsg_WindowKeyPress, int, int, int)
+
+// This message notifies the AutomationProvider to create a tab which is
+// hosted by an external process.
+// Request:
+//   ExternalTabSettings - settings for external tab
+IPC_SYNC_MESSAGE_ROUTED1_4(AutomationMsg_CreateExternalTab,
+                           IPC::ExternalTabSettings  /* settings*/,
+                           gfx::NativeWindow  /* Tab container window */,
+                           gfx::NativeWindow  /* Tab window */,
+                           int  /* Handle to the new tab */,
+                           int  /* Session Id of the new tab */)
+
+// This message notifies the AutomationProvider to navigate to a specified
+// url in the external tab with given handle. The first parameter is the
+// handle to the tab resource. The second parameter is the target url.
+// The third parameter is the referrer.
+// The return value contains a status code which is nonnegative on success.
+// see AutomationMsg_NavigationResponseValues for the navigation response.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_NavigateInExternalTab,
+                           int,
+                           GURL,
+                           GURL,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message is an outgoing message from Chrome to an external host.
+// It is a notification that the NavigationState was changed
+// Request:
+//   -int: The flags specifying what changed
+//         (see TabContents::InvalidateTypes)
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED3(AutomationMsg_NavigationStateChanged,
+                    int,  // tab handle
+                    int,  // TabContents::InvalidateTypes
+                    IPC::NavigationInfo)  // title, url etc.
+
+// This message is an outgoing message from Chrome to an external host.
+// It is a notification that the target URL has changed (the target URL
+// is the URL of the link that the user is hovering on)
+// Request:
+//   -int: The tab handle
+//   -std::wstring: The new target URL
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED2(AutomationMsg_UpdateTargetUrl, int, std::wstring)
+
+// This message notifies the AutomationProvider to show the specified html
+// text in an interstitial page in the tab with given handle. The first
+// parameter is the handle to the tab resource. The second parameter is the
+// html text to be displayed.
+// The return value contains a success flag.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_ShowInterstitialPage,
+                           int,
+                           std::string,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message notifies the AutomationProvider to hide the current
+// interstitial page in the tab with given handle. The parameter is the
+// handle to the tab resource.
+// The return value contains a success flag.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_HideInterstitialPage, int,
+                           bool)
+
+// This message requests that a tab be closed.
+// Request:
+//   - int: handle of the tab to close
+//   - bool: if true the proxy blocks until the tab has completely closed,
+//           otherwise the proxy only blocks until it initiates the close.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_CloseTab, int, bool, bool)
+
+// This message requests that the browser be closed.
+// Request:
+//   - int: handle of the browser which contains the tab
+// Response:
+//  - bool: whether the operation was successfull.
+//  - bool: whether the browser process will be terminated as a result (if
+//          this was the last closed browser window).
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_CloseBrowser, int, bool,
+                           bool)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_CloseBrowserRequestAsync, int)
+
+// Unused.
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED1(AutomationMsg_Unused, int)
 
 #if defined(OS_WIN)
-  // TODO(estade): This message is defined later on for Mac and Linux. This is
-  // to avoid adding a new IPC in the middle for those platforms (see comment
-  // at top). The message is exactly the same, so they should be remerged when
-  // all messages in this file have been made cross-platform (at which point we
-  // will need to check in new reference builds).
-  //
-  // This message requests that a mouse click be performed in window coordinate
-  // space.
-  // Request:
-  //   int - the handle of the window that's the context for this click
-  //   gfx::Point - the point to click
-  //   int - the flags which identify the mouse button(s) for the click, as
-  //       defined in chrome/views/event.h
-  IPC_MESSAGE_ROUTED3(AutomationMsg_WindowClick, int, gfx::Point, int)
+// TODO(port): Port these messages.
+//
+// This message is an outgoing message from Chrome to an external host.
+// It is a request to process a keyboard accelerator.
+// Request:
+//   -int: Tab handle
+//   -MSG: The keyboard message
+// Response:
+//   None expected
+// TODO(sanjeevr): Ideally we need to add a response from the external
+// host saying whether it processed the accelerator
+IPC_MESSAGE_ROUTED2(AutomationMsg_HandleAccelerator, int, MSG)
+
+// This message is sent by the container of an externally hosted tab to
+// reflect any accelerator keys that it did not process. This gives the
+// tab a chance to handle the keys
+// Request:
+//   - int: handle of the tab
+//   -MSG: The keyboard message that the container did not handle
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED2(AutomationMsg_ProcessUnhandledAccelerator, int, MSG)
 #endif  // defined(OS_WIN)
 
-  // This message requests that a key press be performed.
-  // Request:
-  //   int - the handle of the window that's the context for this click
-  //   int - the app::KeyboardCode of the key that was pressed.
-  //   int - the flags which identify the modifiers (shift, ctrl, alt)
-  //         associated for, as defined in chrome/views/event.h
-  IPC_MESSAGE_ROUTED3(AutomationMsg_WindowKeyPress, int, int, int)
-
-  // This message notifies the AutomationProvider to create a tab which is
-  // hosted by an external process.
-  // Request:
-  //   ExternalTabSettings - settings for external tab
-  IPC_SYNC_MESSAGE_ROUTED1_4(AutomationMsg_CreateExternalTab,
-                             IPC::ExternalTabSettings  /* settings*/,
-                             gfx::NativeWindow  /* Tab container window */,
-                             gfx::NativeWindow  /* Tab window */,
-                             int  /* Handle to the new tab */,
-                             int  /* Session Id of the new tab */)
-
-  // This message notifies the AutomationProvider to navigate to a specified
-  // url in the external tab with given handle. The first parameter is the
-  // handle to the tab resource. The second parameter is the target url.
-  // The third parameter is the referrer.
-  // The return value contains a status code which is nonnegative on success.
-  // see AutomationMsg_NavigationResponseValues for the navigation response.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_NavigateInExternalTab,
-                             int,
-                             GURL,
-                             GURL,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message is an outgoing message from Chrome to an external host.
-  // It is a notification that the NavigationState was changed
-  // Request:
-  //   -int: The flags specifying what changed
-  //         (see TabContents::InvalidateTypes)
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED3(AutomationMsg_NavigationStateChanged,
-                      int,  // tab handle
-                      int,  // TabContents::InvalidateTypes
-                      IPC::NavigationInfo)  // title, url etc.
-
-  // This message is an outgoing message from Chrome to an external host.
-  // It is a notification that the target URL has changed (the target URL
-  // is the URL of the link that the user is hovering on)
-  // Request:
-  //   -int: The tab handle
-  //   -std::wstring: The new target URL
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED2(AutomationMsg_UpdateTargetUrl, int, std::wstring)
-
-  // This message notifies the AutomationProvider to show the specified html
-  // text in an interstitial page in the tab with given handle. The first
-  // parameter is the handle to the tab resource. The second parameter is the
-  // html text to be displayed.
-  // The return value contains a success flag.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_ShowInterstitialPage,
-                             int,
-                             std::string,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message notifies the AutomationProvider to hide the current
-  // interstitial page in the tab with given handle. The parameter is the
-  // handle to the tab resource.
-  // The return value contains a success flag.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_HideInterstitialPage, int,
-                             bool)
-
-  // This message requests that a tab be closed.
-  // Request:
-  //   - int: handle of the tab to close
-  //   - bool: if true the proxy blocks until the tab has completely closed,
-  //           otherwise the proxy only blocks until it initiates the close.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_CloseTab, int, bool, bool)
-
-  // This message requests that the browser be closed.
-  // Request:
-  //   - int: handle of the browser which contains the tab
-  // Response:
-  //  - bool: whether the operation was successfull.
-  //  - bool: whether the browser process will be terminated as a result (if
-  //          this was the last closed browser window).
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_CloseBrowser, int, bool,
-                             bool)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_CloseBrowserRequestAsync, int)
-
-  // Unused.
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED1(AutomationMsg_Unused, int)
+// Sent by the external tab to the host to notify that the user has tabbed
+// out of the tab.
+// Request:
+//   - int: Tab handle
+//   - bool: |reverse| set to true when shift-tabbing out of the tab, false
+//    otherwise.
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED2(AutomationMsg_TabbedOut, int, bool)
+
+// Sent by the external tab host to ask focus to be set to either the first
+// or last element on the page.
+// Request:
+//   - int: handle of the tab
+//   - bool: |reverse|
+//      true: Focus will be set to the last focusable element
+//      false: Focus will be set to the first focusable element
+//   - bool: |restore_focus_to_view|
+//      true: The renderer view associated with the current tab will be
+//            infomed that it is receiving focus.
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED3(AutomationMsg_SetInitialFocus, int, bool, bool)
+
+// This message is an outgoing message from Chrome to an external host.
+// It is a request to open a url
+// Request:
+//   -int: Tab handle
+//   -GURL: The URL to open
+//   -GURL: The referrer
+//   -int: The WindowOpenDisposition that specifies where the URL should
+//         be opened (new tab, new window etc).
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED4(AutomationMsg_OpenURL, int, GURL, GURL, int)
+
+// This message requests the provider to wait until the specified tab has
+// finished restoring after session restore.
+// Request:
+//   - int: handle of the tab
+// Response:
+//  - bool: whether the operation was successful.
+IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_WaitForTabToBeRestored, int)
+
+// This message is an outgoing message from Chrome to an external host.
+// It is a notification that a navigation happened
+// Request:
+//   -int:  Tab handle
+//
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED2(AutomationMsg_DidNavigate, int, IPC::NavigationInfo)
+
+// This message requests the different security states of the page displayed
+// in the specified tab.
+// Request:
+//   - int: handle of the tab
+// Response:
+//  - bool: whether the operation was successful.
+//  - SecurityStyle: the security style of the tab.
+//  - int: the status of the server's ssl cert (0 means no errors or no ssl
+//         was used).
+//  - int: the insecure content state, 0 means no insecure contents.
+
+IPC_SYNC_MESSAGE_ROUTED1_4(AutomationMsg_GetSecurityState,
+                           int,
+                           bool,
+                           SecurityStyle,
+                           int,
+                           int)
+
+// This message requests the page type of the page displayed in the specified
+// tab (normal, error or interstitial).
+// Request:
+//   - int: handle of the tab
+// Response:
+//  - bool: whether the operation was successful.
+//  - PageType: the type of the page currently displayed.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_GetPageType, int, bool, PageType)
+
+// This message simulates the user action on the SSL blocking page showing in
+// the specified tab.  This message is only effective if an interstitial page
+// is showing in the tab.
+// Request:
+//   - int: handle of the tab
+//   - bool: whether to proceed or abort the navigation
+// Response:
+//  - AutomationMsg_NavigationResponseValues: result of the operation.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_ActionOnSSLBlockingPage, int, bool,
+                           AutomationMsg_NavigationResponseValues)
+
+// Message to request that a browser window is brought to the front and
+// activated.
+// Request:
+//   - int: handle of the browser window.
+// Response:
+//   - bool: True if the browser is brought to the front.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_BringBrowserToFront, int, bool)
+
+// Message to request whether a certain item is enabled of disabled in the
+// menu in the browser window
+//
+// Request:
+//   - int: handle of the browser window.
+//   - int: IDC message identifier to query if enabled
+// Response:
+//   - bool: True if the command is enabled on the menu
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_IsMenuCommandEnabled, int, int, bool)
+
+// This message notifies the AutomationProvider to print the tab with given
+// handle. The first parameter is the handle to the tab resource.  The
+// return value contains a bool which is true on success.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_PrintNow, int, bool)
+
+// This message notifies the AutomationProvider to reload the current page in
+// the tab with given handle. The first parameter is the handle to the tab
+// resource.  The return value contains a status code which is nonnegative on
+// success.
+// see AutomationMsg_NavigationResponseValues for the navigation response.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_Reload, int,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message requests the handle (int64 app-unique identifier) of the
+// last active browser window, or the browser at index 0 if there is no last
+// active browser, or it no longer exists. Returns 0 if no browser windows
+// exist.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_LastActiveBrowserWindow, int)
+
+// This message notifies the AutomationProvider to save the page with given
+// handle. The first parameter is the handle to the tab resource. The second
+// parameter is the main HTML file name. The third parameter is the directory
+// for saving resources. The fourth parameter is the saving type: 0 for HTML
+// only; 1 for complete web page.
+// The return value contains a bool which is true on success.
+IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_SavePage, int, FilePath, FilePath,
+                           int, bool)
+
+// This message requests the text currently being displayed in the
+// AutocompleteEdit.  The parameter is the handle to the AutocompleteEdit.
+// The return value is a string indicating the text in the AutocompleteEdit.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_AutocompleteEditGetText,
+                           int /* autocomplete edit handle */,
+                           bool /* the requested autocomplete edit exists */,
+                           std::wstring /* omnibox text */)
+
+// This message sets the text being displayed in the AutocompleteEdit.  The
+// first parameter is the handle to the omnibox and the second parameter is
+// the text to be displayed in the AutocompleteEdit.
+// The return value has no parameters and is returned when the operation has
+// completed.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_AutocompleteEditSetText,
+                           int /* autocomplete edit handle */,
+                           std::wstring /* text to set */,
+                           bool /* the requested autocomplete edit exists */)
+
+// This message requests if a query to a autocomplete provider is still in
+// progress.  The first parameter in the request is the handle to the
+// autocomplete edit.
+// The first return value indicates if the request succeeded.
+// The second return value indicates if a query is still in progress.
+IPC_SYNC_MESSAGE_ROUTED1_2( \
+    AutomationMsg_AutocompleteEditIsQueryInProgress,
+    int /* autocomplete edit handle*/,
+    bool /* the requested autocomplete edit exists */,
+    bool /* indicates if a query is in progress */)
+
+// This message requests a list of the autocomplete messages currently being
+// displayed by the popup.  The parameter in the request is a handle to the
+// autocomplete edit.
+// The first return value indicates if the request was successful, while
+// while the second is the actual list of matches.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_AutocompleteEditGetMatches,
+                           int /* autocomplete edit handle*/,
+                           bool /* the requested autocomplete edit exists */,
+                           std::vector<AutocompleteMatchData> /* matches */)
+
+// This message requests the execution of a browser command in the browser
+// for which the handle is specified.
+// The return value contains a boolean, whether the command was dispatched.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WindowExecuteCommandAsync,
+                           int /* automation handle */,
+                           int /* browser command */,
+                           bool /* success flag */)
+
+// This message requests the execution of a browser command in the browser
+// for which the handle is specified.
+// The return value contains a boolean, whether the command was dispatched
+// and successful executed.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WindowExecuteCommand,
+                           int /* automation handle */,
+                           int /* browser command */,
+                           bool /* success flag */)
+
+
+// This message opens the Find window within a tab corresponding to the
+// supplied tab handle.
+IPC_MESSAGE_ROUTED1(AutomationMsg_OpenFindInPage,
+                    int /* tab_handle */)
+
+// Posts a message from external host to chrome renderer.
+IPC_MESSAGE_ROUTED4(AutomationMsg_HandleMessageFromExternalHost,
+                    int /* automation handle */,
+                    std::string /* message */,
+                    std::string /* origin */,
+                    std::string /* target */)
+
+// A message for an external host.
+IPC_MESSAGE_ROUTED4(AutomationMsg_ForwardMessageToExternalHost,
+                    int, /* handle */
+                    std::string /* message */,
+                    std::string /* origin */,
+                    std::string /* target */)
+
+// This message starts a find within a tab corresponding to the supplied
+// tab handle. The parameter |request| specifies what to search for.
+// If an error occurs, |matches_found| will be -1.
+//
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_Find,
+                           int /* tab_handle */,
+                           AutomationMsg_Find_Params /* params */,
+                           int /* active_ordinal */,
+                           int /* matches_found */)
+
+// Is the Find window fully visible (and not animating) for the specified
+// tab?
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_FindWindowVisibility,
+                           int /* tab_handle */,
+                           bool /* is_visible */)
+
+// Where is the Find window located. |x| and |y| will be -1, -1 on failure.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_FindWindowLocation,
+                           int /* tab_handle */,
+                           int /* x */,
+                           int /* y */)
+
+// Is the Bookmark bar visible? The return value will indicate whether it is
+// visible or not and whether it is being animated into (or out of its place).
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_BookmarkBarVisibility,
+                           int /* browser_handle */,
+                           bool, /* is_visible */
+                           bool  /* still_animating */)
+
+// This message requests the number of related info bars opened.  It
+// returns -1 if an error occurred.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetInfoBarCount,
+                           int /* tab_handle */,
+                           int /* info bar count */)
+
+// This message triggers the action associated with the "accept" button in
+// the info-bar at the specified index.  If |wait for navigation| is true, it
+// won't return until a navigation has occurred.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_ClickInfoBarAccept,
+                           int /* tab_handle */,
+                           int /* info bar index */,
+                           bool /* wait for navigation */,
+
+                           /* navigation result */
+                           AutomationMsg_NavigationResponseValues)
+
+// This message retrieves the last time a navigation occurred in the specified
+// tab.  The value is intended to be used with WaitForNavigation.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetLastNavigationTime,
+                           int /* tab_handle */,
+                           int64 /* last navigation time */)
+
+// This messages is used to block until a new navigation occurs (if there is
+// none more recent then the time specified).
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WaitForNavigation,
+                           int /* tab_handle */,
+                           int64 /* last navigation time */,
+
+                           /* navigation result */
+                           AutomationMsg_NavigationResponseValues)
+
+// This messages sets an int-value preference.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetIntPreference,
+                           int /* browser handle */,
+                           std::string /* pref name */,
+                           int /* value */,
+                           bool /* success */)
+
+// Queries whether an app modal dialog is currently being shown. (i.e. a
+// javascript alert) and which buttons it contains.
+IPC_SYNC_MESSAGE_ROUTED0_2(AutomationMsg_ShowingAppModalDialog,
+                           bool /* showing dialog */,
+                           int /* view::DelegateDialog::DialogButton */)
+
+// This message triggers the specified button for the currently showing
+// modal dialog.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ClickAppModalDialogButton,
+                           int /* view::DelegateDialog::DialogButton */,
+                           bool /* success */)
+
+// This messages sets a string-value preference.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetStringPreference,
+                           int /* browser handle */,
+                           std::string /* pref name */,
+                           std::string /* pref value */,
+                           bool)
+
+// This messages gets a boolean-value preference.
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_GetBooleanPreference,
+                           int /* browser handle */,
+                           std::string /* pref name */,
+                           bool /* success */,
+                           bool /* pref value */)
+
+// This messages sets a boolean-value preference.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetBooleanPreference,
+                           int /* browser handle */,
+                           std::string /* pref name */,
+                           bool /* pref value */,
+                           bool /* success */)
+
+// Queries the current used encoding name of the page in the specified
+// web content tab.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetPageCurrentEncoding,
+                           int /* tab handle */,
+                           std::string /* current used encoding name */)
+
+// Uses the specified encoding to override the encoding of the page in the
+// specified web content tab.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_OverrideEncoding,
+                           int /* tab handle */,
+                           std::string /* overrided encoding name */,
+                           bool /* success */)
+
+// Used to disable the dialog box that prompts the user for a path when
+// saving a web page.
+IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_SavePackageShouldPromptUser,
+                           bool /* false if we want to not show the dialog */)
+
+// This message is an outgoing message from Chrome to an external host.
+// It is a notification that a navigation failed
+// Request:
+//   -int : Tab handle
+//   -int : The status code.
+//   -GURL:  The URL we failed to navigate to.
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED3(AutomationMsg_NavigationFailed, int, int, GURL)
 
 #if defined(OS_WIN)
-  // TODO(port): Port these messages.
-  //
-  // This message is an outgoing message from Chrome to an external host.
-  // It is a request to process a keyboard accelerator.
-  // Request:
-  //   -int: Tab handle
-  //   -MSG: The keyboard message
-  // Response:
-  //   None expected
-  // TODO(sanjeevr): Ideally we need to add a response from the external
-  // host saying whether it processed the accelerator
-  IPC_MESSAGE_ROUTED2(AutomationMsg_HandleAccelerator, int, MSG)
-
-  // This message is sent by the container of an externally hosted tab to
-  // reflect any accelerator keys that it did not process. This gives the
-  // tab a chance to handle the keys
-  // Request:
-  //   - int: handle of the tab
-  //   -MSG: The keyboard message that the container did not handle
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED2(AutomationMsg_ProcessUnhandledAccelerator, int, MSG)
+// This message is an outgoing message from an automation client to Chrome.
+// It is used to reposition a chrome tab window.
+IPC_MESSAGE_ROUTED2(AutomationMsg_TabReposition,
+                    int /* tab handle */,
+                    IPC::Reposition_Params /* SetWindowPos params */)
 #endif  // defined(OS_WIN)
 
-  // Sent by the external tab to the host to notify that the user has tabbed
-  // out of the tab.
-  // Request:
-  //   - int: Tab handle
-  //   - bool: |reverse| set to true when shift-tabbing out of the tab, false
-  //    otherwise.
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED2(AutomationMsg_TabbedOut, int, bool)
-
-  // Sent by the external tab host to ask focus to be set to either the first
-  // or last element on the page.
-  // Request:
-  //   - int: handle of the tab
-  //   - bool: |reverse|
-  //      true: Focus will be set to the last focusable element
-  //      false: Focus will be set to the first focusable element
-  //   - bool: |restore_focus_to_view|
-  //      true: The renderer view associated with the current tab will be
-  //            infomed that it is receiving focus.
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED3(AutomationMsg_SetInitialFocus, int, bool, bool)
-
-  // This message is an outgoing message from Chrome to an external host.
-  // It is a request to open a url
-  // Request:
-  //   -int: Tab handle
-  //   -GURL: The URL to open
-  //   -GURL: The referrer
-  //   -int: The WindowOpenDisposition that specifies where the URL should
-  //         be opened (new tab, new window etc).
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED4(AutomationMsg_OpenURL, int, GURL, GURL, int)
-
-  // This message requests the provider to wait until the specified tab has
-  // finished restoring after session restore.
-  // Request:
-  //   - int: handle of the tab
-  // Response:
-  //  - bool: whether the operation was successful.
-  IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_WaitForTabToBeRestored, int)
-
-  // This message is an outgoing message from Chrome to an external host.
-  // It is a notification that a navigation happened
-  // Request:
-  //   -int:  Tab handle
-  //
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED2(AutomationMsg_DidNavigate, int, IPC::NavigationInfo)
-
-  // This message requests the different security states of the page displayed
-  // in the specified tab.
-  // Request:
-  //   - int: handle of the tab
-  // Response:
-  //  - bool: whether the operation was successful.
-  //  - SecurityStyle: the security style of the tab.
-  //  - int: the status of the server's ssl cert (0 means no errors or no ssl
-  //         was used).
-  //  - int: the insecure content state, 0 means no insecure contents.
-
-  IPC_SYNC_MESSAGE_ROUTED1_4(AutomationMsg_GetSecurityState,
-                             int,
-                             bool,
-                             SecurityStyle,
-                             int,
-                             int)
-
-  // This message requests the page type of the page displayed in the specified
-  // tab (normal, error or interstitial).
-  // Request:
-  //   - int: handle of the tab
-  // Response:
-  //  - bool: whether the operation was successful.
-  //  - PageType: the type of the page currently displayed.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_GetPageType, int, bool, PageType)
-
-  // This message simulates the user action on the SSL blocking page showing in
-  // the specified tab.  This message is only effective if an interstitial page
-  // is showing in the tab.
-  // Request:
-  //   - int: handle of the tab
-  //   - bool: whether to proceed or abort the navigation
-  // Response:
-  //  - AutomationMsg_NavigationResponseValues: result of the operation.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_ActionOnSSLBlockingPage, int, bool,
-                             AutomationMsg_NavigationResponseValues)
-
-  // Message to request that a browser window is brought to the front and
-  // activated.
-  // Request:
-  //   - int: handle of the browser window.
-  // Response:
-  //   - bool: True if the browser is brought to the front.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_BringBrowserToFront, int, bool)
-
-  // Message to request whether a certain item is enabled of disabled in the
-  // menu in the browser window
-  //
-  // Request:
-  //   - int: handle of the browser window.
-  //   - int: IDC message identifier to query if enabled
-  // Response:
-  //   - bool: True if the command is enabled on the menu
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_IsMenuCommandEnabled, int, int, bool)
-
-  // This message notifies the AutomationProvider to print the tab with given
-  // handle. The first parameter is the handle to the tab resource.  The
-  // return value contains a bool which is true on success.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_PrintNow, int, bool)
-
-  // This message notifies the AutomationProvider to reload the current page in
-  // the tab with given handle. The first parameter is the handle to the tab
-  // resource.  The return value contains a status code which is nonnegative on
-  // success.
-  // see AutomationMsg_NavigationResponseValues for the navigation response.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_Reload, int,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message requests the handle (int64 app-unique identifier) of the
-  // last active browser window, or the browser at index 0 if there is no last
-  // active browser, or it no longer exists. Returns 0 if no browser windows
-  // exist.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_LastActiveBrowserWindow, int)
-
-  // This message notifies the AutomationProvider to save the page with given
-  // handle. The first parameter is the handle to the tab resource. The second
-  // parameter is the main HTML file name. The third parameter is the directory
-  // for saving resources. The fourth parameter is the saving type: 0 for HTML
-  // only; 1 for complete web page.
-  // The return value contains a bool which is true on success.
-  IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_SavePage, int, FilePath, FilePath,
-                             int, bool)
-
-  // This message requests the text currently being displayed in the
-  // AutocompleteEdit.  The parameter is the handle to the AutocompleteEdit.
-  // The return value is a string indicating the text in the AutocompleteEdit.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_AutocompleteEditGetText,
-                             int /* autocomplete edit handle */,
-                             bool /* the requested autocomplete edit exists */,
-                             std::wstring /* omnibox text */)
-
-  // This message sets the text being displayed in the AutocompleteEdit.  The
-  // first parameter is the handle to the omnibox and the second parameter is
-  // the text to be displayed in the AutocompleteEdit.
-  // The return value has no parameters and is returned when the operation has
-  // completed.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_AutocompleteEditSetText,
-                             int /* autocomplete edit handle */,
-                             std::wstring /* text to set */,
-                             bool /* the requested autocomplete edit exists */)
-
-  // This message requests if a query to a autocomplete provider is still in
-  // progress.  The first parameter in the request is the handle to the
-  // autocomplete edit.
-  // The first return value indicates if the request succeeded.
-  // The second return value indicates if a query is still in progress.
-  IPC_SYNC_MESSAGE_ROUTED1_2( \
-      AutomationMsg_AutocompleteEditIsQueryInProgress,
-      int /* autocomplete edit handle*/,
-      bool /* the requested autocomplete edit exists */,
-      bool /* indicates if a query is in progress */)
-
-  // This message requests a list of the autocomplete messages currently being
-  // displayed by the popup.  The parameter in the request is a handle to the
-  // autocomplete edit.
-  // The first return value indicates if the request was successful, while
-  // while the second is the actual list of matches.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_AutocompleteEditGetMatches,
-                             int /* autocomplete edit handle*/,
-                             bool /* the requested autocomplete edit exists */,
-                             std::vector<AutocompleteMatchData> /* matches */)
-
-  // This message requests the execution of a browser command in the browser
-  // for which the handle is specified.
-  // The return value contains a boolean, whether the command was dispatched.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WindowExecuteCommandAsync,
-                             int /* automation handle */,
-                             int /* browser command */,
-                             bool /* success flag */)
-
-  // This message requests the execution of a browser command in the browser
-  // for which the handle is specified.
-  // The return value contains a boolean, whether the command was dispatched
-  // and successful executed.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WindowExecuteCommand,
-                             int /* automation handle */,
-                             int /* browser command */,
-                             bool /* success flag */)
-
-
-  // This message opens the Find window within a tab corresponding to the
-  // supplied tab handle.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_OpenFindInPage,
-                      int /* tab_handle */)
-
-  // Posts a message from external host to chrome renderer.
-  IPC_MESSAGE_ROUTED4(AutomationMsg_HandleMessageFromExternalHost,
-                      int /* automation handle */,
-                      std::string /* message */,
-                      std::string /* origin */,
-                      std::string /* target */)
-
-  // A message for an external host.
-  IPC_MESSAGE_ROUTED4(AutomationMsg_ForwardMessageToExternalHost,
-                      int, /* handle */
-                      std::string /* message */,
-                      std::string /* origin */,
-                      std::string /* target */)
-
-  // This message starts a find within a tab corresponding to the supplied
-  // tab handle. The parameter |request| specifies what to search for.
-  // If an error occurs, |matches_found| will be -1.
-  //
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_Find,
-                             int /* tab_handle */,
-                             AutomationMsg_Find_Params /* params */,
-                             int /* active_ordinal */,
-                             int /* matches_found */)
-
-  // Is the Find window fully visible (and not animating) for the specified
-  // tab?
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_FindWindowVisibility,
-                             int /* tab_handle */,
-                             bool /* is_visible */)
-
-  // Where is the Find window located. |x| and |y| will be -1, -1 on failure.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_FindWindowLocation,
-                             int /* tab_handle */,
-                             int /* x */,
-                             int /* y */)
-
-  // Is the Bookmark bar visible? The return value will indicate whether it is
-  // visible or not and whether it is being animated into (or out of its place).
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_BookmarkBarVisibility,
-                             int /* browser_handle */,
-                             bool, /* is_visible */
-                             bool  /* still_animating */)
-
-  // This message requests the number of related info bars opened.  It
-  // returns -1 if an error occurred.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetInfoBarCount,
-                             int /* tab_handle */,
-                             int /* info bar count */)
-
-  // This message triggers the action associated with the "accept" button in
-  // the info-bar at the specified index.  If |wait for navigation| is true, it
-  // won't return until a navigation has occurred.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_ClickInfoBarAccept,
-                             int /* tab_handle */,
-                             int /* info bar index */,
-                             bool /* wait for navigation */,
-
-                             /* navigation result */
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message retrieves the last time a navigation occurred in the specified
-  // tab.  The value is intended to be used with WaitForNavigation.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetLastNavigationTime,
-                             int /* tab_handle */,
-                             int64 /* last navigation time */)
-
-  // This messages is used to block until a new navigation occurs (if there is
-  // none more recent then the time specified).
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WaitForNavigation,
-                             int /* tab_handle */,
-                             int64 /* last navigation time */,
-
-                             /* navigation result */
-                             AutomationMsg_NavigationResponseValues)
-
-  // This messages sets an int-value preference.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetIntPreference,
-                             int /* browser handle */,
-                             std::string /* pref name */,
-                             int /* value */,
-                             bool /* success */)
-
-  // Queries whether an app modal dialog is currently being shown. (i.e. a
-  // javascript alert) and which buttons it contains.
-  IPC_SYNC_MESSAGE_ROUTED0_2(AutomationMsg_ShowingAppModalDialog,
-                             bool /* showing dialog */,
-                             int /* view::DelegateDialog::DialogButton */)
-
-  // This message triggers the specified button for the currently showing
-  // modal dialog.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ClickAppModalDialogButton,
-                             int /* view::DelegateDialog::DialogButton */,
-                             bool /* success */)
-
-  // This messages sets a string-value preference.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetStringPreference,
-                             int /* browser handle */,
-                             std::string /* pref name */,
-                             std::string /* pref value */,
-                             bool)
-
-  // This messages gets a boolean-value preference.
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_GetBooleanPreference,
-                             int /* browser handle */,
-                             std::string /* pref name */,
-                             bool /* success */,
-                             bool /* pref value */)
-
-  // This messages sets a boolean-value preference.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetBooleanPreference,
-                             int /* browser handle */,
-                             std::string /* pref name */,
-                             bool /* pref value */,
-                             bool /* success */)
-
-  // Queries the current used encoding name of the page in the specified
-  // web content tab.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetPageCurrentEncoding,
-                             int /* tab handle */,
-                             std::string /* current used encoding name */)
-
-  // Uses the specified encoding to override the encoding of the page in the
-  // specified web content tab.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_OverrideEncoding,
-                             int /* tab handle */,
-                             std::string /* overrided encoding name */,
-                             bool /* success */)
-
-  // Used to disable the dialog box that prompts the user for a path when
-  // saving a web page.
-  IPC_SYNC_MESSAGE_ROUTED1_0(AutomationMsg_SavePackageShouldPromptUser,
-                             bool /* false if we want to not show the dialog */)
-
-  // This message is an outgoing message from Chrome to an external host.
-  // It is a notification that a navigation failed
-  // Request:
-  //   -int : Tab handle
-  //   -int : The status code.
-  //   -GURL:  The URL we failed to navigate to.
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED3(AutomationMsg_NavigationFailed, int, int, GURL)
+// Gets the title of the top level browser window.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WindowTitle,
+                           int /* automation handle */,
+                           string16 /* title text */ )
+
+// Tab load complete
+IPC_MESSAGE_ROUTED2(AutomationMsg_TabLoaded,
+                    int,  // tab handle
+                    GURL)
+
+// This message requests the tabstrip index of the tab with the given handle.
+// The return value contains the index, which will be -1 on failure.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabIndex, int, int)
+
+// This message requests the handle (int64 app-unique identifier) of
+// a valid normal browser window, i.e. normal type and non-incognito mode.
+// On error, the returned handle value is 0.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_FindNormalBrowserWindow, int)
+
+// This message requests the number of normal browser windows, i.e. normal
+// type and non-incognito mode that the app currently has open.  The return
+// value is the number of windows.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_NormalBrowserWindowCount, int)
+
+// Used to put the browser into "extension automation mode" for a given
+// set of Chrome Extensions API functions for the current profile, or turn
+// off automation mode.  The specified tab is used as the conduit for all
+// automated API functions.  It must be an external tab (as in
+// AutomationMsg_CreateExternalTab).
+IPC_MESSAGE_ROUTED2(AutomationMsg_SetEnableExtensionAutomation,
+                    // Tab handle.
+                    int,
+                    // Empty to disable automation, non-empty to enable
+                    // automation of the specified API functions, single
+                    // entry of "*" to enable automation of all API
+                    // functions.
+                    std::vector<std::string>)
+
+// This message tells the browser to start using the new proxy configuration
+// represented by the given JSON string. The parameters used in the JSON
+// string are defined in automation_constants.h.
+IPC_MESSAGE_ROUTED1(AutomationMsg_SetProxyConfig,
+                    std::string /* proxy_config_json_string */)
+
+// Sets Download Shelf visibility for the specified browser.
+IPC_SYNC_MESSAGE_ROUTED2_0(AutomationMsg_SetShelfVisibility,
+                           int /* browser_handle */,
+                           bool /* is_visible */)
+
+// This message requests the number of blocked popups in a certain tab with
+// the given handle. The return value is the number of blocked popups, or -1
+// if this request failed.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_BlockedPopupCount,
+                           int /* tab_handle */,
+                           int /* blocked_popup_count */)
+
+// This message retrieves the locale of the browser process.  On success
+// |chrome_locale| will contain the locale as reported by ICU.  On failure
+// |chrome_locale| is the empty string.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_GetBrowserLocale,
+                           string16 /* chrome_locale */)
 
 #if defined(OS_WIN)
-  // This message is an outgoing message from an automation client to Chrome.
-  // It is used to reposition a chrome tab window.
-  IPC_MESSAGE_ROUTED2(AutomationMsg_TabReposition,
-                      int /* tab handle */,
-                      IPC::Reposition_Params /* SetWindowPos params */)
-#endif  // defined(OS_WIN)
-
-  // Gets the title of the top level browser window.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WindowTitle,
-                             int /* automation handle */,
-                             string16 /* title text */ )
-
-  // Tab load complete
-  IPC_MESSAGE_ROUTED2(AutomationMsg_TabLoaded,
-                      int,  // tab handle
-                      GURL)
-
-  // This message requests the tabstrip index of the tab with the given handle.
-  // The return value contains the index, which will be -1 on failure.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TabIndex, int, int)
-
-  // This message requests the handle (int64 app-unique identifier) of
-  // a valid normal browser window, i.e. normal type and non-incognito mode.
-  // On error, the returned handle value is 0.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_FindNormalBrowserWindow, int)
-
-  // This message requests the number of normal browser windows, i.e. normal
-  // type and non-incognito mode that the app currently has open.  The return
-  // value is the number of windows.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_NormalBrowserWindowCount, int)
-
-  // Used to put the browser into "extension automation mode" for a given
-  // set of Chrome Extensions API functions for the current profile, or turn
-  // off automation mode.  The specified tab is used as the conduit for all
-  // automated API functions.  It must be an external tab (as in
-  // AutomationMsg_CreateExternalTab).
-  IPC_MESSAGE_ROUTED2(AutomationMsg_SetEnableExtensionAutomation,
-                      // Tab handle.
-                      int,
-                      // Empty to disable automation, non-empty to enable
-                      // automation of the specified API functions, single
-                      // entry of "*" to enable automation of all API
-                      // functions.
-                      std::vector<std::string>)
-
-  // This message tells the browser to start using the new proxy configuration
-  // represented by the given JSON string. The parameters used in the JSON
-  // string are defined in automation_constants.h.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_SetProxyConfig,
-                      std::string /* proxy_config_json_string */)
-
-  // Sets Download Shelf visibility for the specified browser.
-  IPC_SYNC_MESSAGE_ROUTED2_0(AutomationMsg_SetShelfVisibility,
-                             int /* browser_handle */,
-                             bool /* is_visible */)
-
-  // This message requests the number of blocked popups in a certain tab with
-  // the given handle. The return value is the number of blocked popups, or -1
-  // if this request failed.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_BlockedPopupCount,
-                             int /* tab_handle */,
-                             int /* blocked_popup_count */)
-
-  // This message retrieves the locale of the browser process.  On success
-  // |chrome_locale| will contain the locale as reported by ICU.  On failure
-  // |chrome_locale| is the empty string.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_GetBrowserLocale,
-                             string16 /* chrome_locale */)
+IPC_MESSAGE_ROUTED4(AutomationMsg_ForwardContextMenuToExternalHost,
+                    int /* tab_handle */,
+                    HANDLE /* source menu handle */,
+                    int    /* align flags */,
+                    IPC::MiniContextMenuParams /* params */)
+
+IPC_MESSAGE_ROUTED2(AutomationMsg_ForwardContextMenuCommandToChrome,
+                    int /* tab_handle */,
+                    int /* selected_command */)
+#endif  // OS_WIN
+
+// A URL request to be fetched via automation
+IPC_MESSAGE_ROUTED3(AutomationMsg_RequestStart,
+                    int /* tab_handle */,
+                    int /* request_id */,
+                    IPC::AutomationURLRequest /* request */)
+
+// Read data from a URL request to be fetched via automation
+IPC_MESSAGE_ROUTED3(AutomationMsg_RequestRead,
+                    int /* tab_handle */,
+                    int /* request_id */,
+                    int /* bytes_to_read */)
+
+// Response to a AutomationMsg_RequestStart message
+IPC_MESSAGE_ROUTED3(AutomationMsg_RequestStarted,
+                    int /* tab_handle */,
+                    int /* request_id */,
+                    IPC::AutomationURLResponse /* response */)
+
+// Data read via automation
+IPC_MESSAGE_ROUTED3(AutomationMsg_RequestData,
+                    int /* tab_handle */,
+                    int /* request_id */,
+                    std::string /* data */)
+
+IPC_MESSAGE_ROUTED3(AutomationMsg_RequestEnd,
+                    int /* tab_handle */,
+                    int /* request_id */,
+                    URLRequestStatus /* status */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_PrintAsync,
+                    int /* tab_handle */)
+
+IPC_MESSAGE_ROUTED3(AutomationMsg_SetCookieAsync,
+                    int /* tab_handle */,
+                    GURL /* url */,
+                    std::string /* cookie */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_SelectAll,
+                    int /* tab handle */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_Cut,
+                    int /* tab handle */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_Copy,
+                    int /* tab handle */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_Paste,
+                    int /* tab handle */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_ReloadAsync,
+                    int /* tab handle */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_StopAsync,
+                    int /* tab handle */)
+
+// Returns the number of times a filter was used to service an URL request.
+// See AutomationMsg_SetFilteredInet.
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_GetFilteredInetHitCount,
+                           int /* hit_count */)
+
+// Is the browser in fullscreen mode?
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_IsFullscreen,
+                           int /* browser_handle */,
+                           bool /* is_fullscreen */)
+
+// Is the fullscreen bubble visible?
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_IsFullscreenBubbleVisible,
+                           int /* browser_handle */,
+                           bool /* is_visible */)
+
+#if defined(OS_POSIX)
+// See previous definition of this message for explanation of why it is
+// defined twice.
+IPC_MESSAGE_ROUTED3(AutomationMsg_WindowClick, int, gfx::Point, int)
+#endif
+
+// This message notifies the AutomationProvider to navigate to a specified
+// url in the tab with given handle. The first parameter is the handle to
+// the tab resource. The second parameter is the target url.  The third
+// parameter is the number of navigations that are required for a successful
+// return value. See AutomationMsg_NavigationResponseValues for the return
+// value.
+IPC_SYNC_MESSAGE_ROUTED3_1(
+    AutomationMsg_NavigateToURLBlockUntilNavigationsComplete, int, GURL, int,
+    AutomationMsg_NavigationResponseValues)
+
+// This message notifies the AutomationProvider to navigate to a specified
+// navigation entry index in the external tab with given handle. The first
+// parameter is the handle to the tab resource. The second parameter is the
+// index of navigation entry.
+// The return value contains a status code which is nonnegative on success.
+// see AutomationMsg_NavigationResponseValues for the navigation response.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigateExternalTabAtIndex, int, int,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message requests the provider to wait until the window count
+// reached the specified value.
+// Request:
+//   - int: target browser window count
+// Response:
+//  - bool: whether the operation was successful.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WaitForBrowserWindowCountToBecome,
+                           int, bool)
+
+// This message requests the provider to wait until an application modal
+// dialog is shown.
+// Response:
+//  - bool: whether the operation was successful
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_WaitForAppModalDialogToBeShown, bool)
+
+// This message notifies the AutomationProvider to navigate back in session
+// history in the tab with given handle. The first parameter is the handle
+// to the tab resource. The second parameter is the number of navigations the
+// provider will wait for.
+// See AutomationMsg_NavigationResponseValues for the navigation response
+// values.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_GoBackBlockUntilNavigationsComplete,
+                           int, int,
+                           AutomationMsg_NavigationResponseValues)
+
+// This message notifies the AutomationProvider to navigate forward in session
+// history in the tab with given handle. The first parameter is the handle
+// to the tab resource. The second parameter is the number of navigations
+// the provider will wait for.
+// See AutomationMsg_NavigationResponseValues for the navigation response
+// values.
+IPC_SYNC_MESSAGE_ROUTED2_1(
+    AutomationMsg_GoForwardBlockUntilNavigationsComplete, int, int,
+    AutomationMsg_NavigationResponseValues)
+
+// This message is used by automation clients to upload histogram data to the
+// browser process.
+IPC_MESSAGE_ROUTED1(AutomationMsg_RecordHistograms,
+                    std::vector<std::string> /* histogram_list */)
+
+IPC_MESSAGE_ROUTED2(AutomationMsg_AttachExternalTab,
+                    int     /* 'source' tab_handle */,
+                    IPC::AttachExternalTabParams)
+
+// Sent when the automation client connects to an existing tab.
+IPC_SYNC_MESSAGE_ROUTED3_4(AutomationMsg_ConnectExternalTab,
+                           uint64 /* cookie */,
+                           bool   /* allow/block tab*/,
+                           gfx::NativeWindow  /* parent window */,
+                           gfx::NativeWindow  /* Tab container window */,
+                           gfx::NativeWindow  /* Tab window */,
+                           int  /* Handle to the new tab */,
+                           int  /* Session Id of the new tab */)
+
+#if defined(OS_POSIX)
+// TODO(estade): this should be merged with the windows message of the same
+// name. See comment for WindowClick.
+IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_WindowDrag,
+                           int, std::vector<gfx::Point>, int, bool, bool)
+#endif  // defined(OS_POSIX)
+
+// This message gets the bounds of the window.
+// Request:
+//   int - the handle of the window to query
+// Response:
+//   gfx::Rect - the bounds of the window
+//   bool - true if the query was successful
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_GetWindowBounds, int, gfx::Rect,
+                           bool)
+
+// Simulate an end of session. Normally this happens when the user
+// shuts down the machine or logs off.
+// Request:
+//   int - the handle of the browser
+// Response:
+//   bool - true if succesful
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TerminateSession, int, bool)
+
+// Returns whether the window is maximized.
+// Request:
+//   int - the handle of the window
+// Response:
+//   bool - true if the window is maximized
+//   bool - true if query is successful
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_IsWindowMaximized, int, bool, bool)
+
+IPC_MESSAGE_ROUTED2(AutomationMsg_SetPageFontSize,
+                    int /* tab_handle */,
+                    int /* The font size */)
+
+// Returns a metric event duration that was last recorded.  Returns -1 if the
+// event hasn't occurred yet.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetMetricEventDuration,
+                           std::string /* event_name */,
+                           int /* duration ms */)
+
+// Sent by automation provider - go to history entry via automation.
+IPC_MESSAGE_ROUTED2(AutomationMsg_RequestGoToHistoryEntryOffset,
+                           int,   // tab handle
+                           int)   // numbers of entries (negative or positive)
+
+// Silently install the extension in the given crx file.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_InstallExtension,
+                           FilePath /* full path to crx file */,
+                           AutomationMsg_ExtensionResponseValues)
+
+// Silently load the extension in the given directory.  This expects an
+// extension expanded into the directory, not a crx file.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_LoadExpandedExtension,
+                           FilePath /* root directory of extension */,
+                           AutomationMsg_ExtensionResponseValues)
+
+// Retrieves a list of the root directories of all enabled extensions
+// that have been installed into Chrome by dropping a .crx file onto
+// Chrome or an equivalent action (including loaded extensions).
+// Other types of extensions are not included on the list (e.g. "component"
+// or "external" extensions) since they are generally not useful for testing
+// (e.g. an external extension could mess with an automated test if it's
+// present on some systems only).
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_GetEnabledExtensions,
+                           std::vector<FilePath>)
+
+// This message requests the type of the window with the given handle. The
+// return value contains the type (Browser::Type), or -1 if the request
+// failed.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_Type, int, int)
+
+// Opens a new browser window of a specific type.
+IPC_SYNC_MESSAGE_ROUTED2_0(AutomationMsg_OpenNewBrowserWindowOfType,
+                           int   /* Type (Browser::Type) */,
+                           bool  /* show */ )
+
+// This message requests that the mouse be moved to this location, in
+// window coordinate space.
+// Request:
+//   int - the handle of the window that's the context for this click
+//   gfx::Point - the location to move to
+IPC_MESSAGE_ROUTED2(AutomationMsg_WindowMouseMove, int, gfx::Point)
+
+// Called when requests should be downloaded using a host browser's
+// download mechanism when chrome is being embedded.
+IPC_MESSAGE_ROUTED2(AutomationMsg_DownloadRequestInHost,
+                    int /* tab_handle */,
+                    int /* request_id */)
+
+// Shuts down the session service for the browser identified by
+// |browser_handle|. On success |result| is set to true.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ShutdownSessionService,
+                           int   /* browser_handle */,
+                           bool  /* result */)
+
+IPC_MESSAGE_ROUTED1(AutomationMsg_SaveAsAsync,
+                    int /* tab handle */)
 
 #if defined(OS_WIN)
-  IPC_MESSAGE_ROUTED4(AutomationMsg_ForwardContextMenuToExternalHost,
-                      int /* tab_handle */,
-                      HANDLE /* source menu handle */,
-                      int    /* align flags */,
-                      IPC::MiniContextMenuParams /* params */)
-
-  IPC_MESSAGE_ROUTED2(AutomationMsg_ForwardContextMenuCommandToChrome,
-                      int /* tab_handle */,
-                      int /* selected_command */)
-#endif  // OS_WIN
-
-  // A URL request to be fetched via automation
-  IPC_MESSAGE_ROUTED3(AutomationMsg_RequestStart,
-                      int /* tab_handle */,
-                      int /* request_id */,
-                      IPC::AutomationURLRequest /* request */)
-
-  // Read data from a URL request to be fetched via automation
-  IPC_MESSAGE_ROUTED3(AutomationMsg_RequestRead,
-                      int /* tab_handle */,
-                      int /* request_id */,
-                      int /* bytes_to_read */)
-
-  // Response to a AutomationMsg_RequestStart message
-  IPC_MESSAGE_ROUTED3(AutomationMsg_RequestStarted,
-                      int /* tab_handle */,
-                      int /* request_id */,
-                      IPC::AutomationURLResponse /* response */)
-
-  // Data read via automation
-  IPC_MESSAGE_ROUTED3(AutomationMsg_RequestData,
-                      int /* tab_handle */,
-                      int /* request_id */,
-                      std::string /* data */)
-
-  IPC_MESSAGE_ROUTED3(AutomationMsg_RequestEnd,
-                      int /* tab_handle */,
-                      int /* request_id */,
-                      URLRequestStatus /* status */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_PrintAsync,
-                      int /* tab_handle */)
-
-  IPC_MESSAGE_ROUTED3(AutomationMsg_SetCookieAsync,
-                      int /* tab_handle */,
-                      GURL /* url */,
-                      std::string /* cookie */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_SelectAll,
-                      int /* tab handle */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_Cut,
-                      int /* tab handle */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_Copy,
-                      int /* tab handle */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_Paste,
-                      int /* tab handle */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_ReloadAsync,
-                      int /* tab handle */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_StopAsync,
-                      int /* tab handle */)
-
-  // Returns the number of times a filter was used to service an URL request.
-  // See AutomationMsg_SetFilteredInet.
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_GetFilteredInetHitCount,
-                             int /* hit_count */)
-
-  // Is the browser in fullscreen mode?
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_IsFullscreen,
-                             int /* browser_handle */,
-                             bool /* is_fullscreen */)
-
-  // Is the fullscreen bubble visible?
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_IsFullscreenBubbleVisible,
-                             int /* browser_handle */,
-                             bool /* is_visible */)
-
-#if defined(OS_POSIX)
-  // See previous definition of this message for explanation of why it is
-  // defined twice.
-  IPC_MESSAGE_ROUTED3(AutomationMsg_WindowClick, int, gfx::Point, int)
+// An incoming message from an automation host to Chrome.  Signals that
+// the browser containing |tab_handle| has moved.
+IPC_MESSAGE_ROUTED1(AutomationMsg_BrowserMove,
+                    int /* tab handle */)
 #endif
 
-  // This message notifies the AutomationProvider to navigate to a specified
-  // url in the tab with given handle. The first parameter is the handle to
-  // the tab resource. The second parameter is the target url.  The third
-  // parameter is the number of navigations that are required for a successful
-  // return value. See AutomationMsg_NavigationResponseValues for the return
-  // value.
-  IPC_SYNC_MESSAGE_ROUTED3_1(
-      AutomationMsg_NavigateToURLBlockUntilNavigationsComplete, int, GURL, int,
-      AutomationMsg_NavigationResponseValues)
-
-  // This message notifies the AutomationProvider to navigate to a specified
-  // navigation entry index in the external tab with given handle. The first
-  // parameter is the handle to the tab resource. The second parameter is the
-  // index of navigation entry.
-  // The return value contains a status code which is nonnegative on success.
-  // see AutomationMsg_NavigationResponseValues for the navigation response.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigateExternalTabAtIndex, int, int,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message requests the provider to wait until the window count
-  // reached the specified value.
-  // Request:
-  //   - int: target browser window count
-  // Response:
-  //  - bool: whether the operation was successful.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WaitForBrowserWindowCountToBecome,
-                             int, bool)
-
-  // This message requests the provider to wait until an application modal
-  // dialog is shown.
-  // Response:
-  //  - bool: whether the operation was successful
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_WaitForAppModalDialogToBeShown, bool)
-
-  // This message notifies the AutomationProvider to navigate back in session
-  // history in the tab with given handle. The first parameter is the handle
-  // to the tab resource. The second parameter is the number of navigations the
-  // provider will wait for.
-  // See AutomationMsg_NavigationResponseValues for the navigation response
-  // values.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_GoBackBlockUntilNavigationsComplete,
-                             int, int,
-                             AutomationMsg_NavigationResponseValues)
-
-  // This message notifies the AutomationProvider to navigate forward in session
-  // history in the tab with given handle. The first parameter is the handle
-  // to the tab resource. The second parameter is the number of navigations
-  // the provider will wait for.
-  // See AutomationMsg_NavigationResponseValues for the navigation response
-  // values.
-  IPC_SYNC_MESSAGE_ROUTED2_1(
-      AutomationMsg_GoForwardBlockUntilNavigationsComplete, int, int,
-      AutomationMsg_NavigationResponseValues)
-
-  // This message is used by automation clients to upload histogram data to the
-  // browser process.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_RecordHistograms,
-                      std::vector<std::string> /* histogram_list */)
-
-  IPC_MESSAGE_ROUTED2(AutomationMsg_AttachExternalTab,
-                      int     /* 'source' tab_handle */,
-                      IPC::AttachExternalTabParams)
-
-  // Sent when the automation client connects to an existing tab.
-  IPC_SYNC_MESSAGE_ROUTED3_4(AutomationMsg_ConnectExternalTab,
-                             uint64 /* cookie */,
-                             bool   /* allow/block tab*/,
-                             gfx::NativeWindow  /* parent window */,
-                             gfx::NativeWindow  /* Tab container window */,
-                             gfx::NativeWindow  /* Tab window */,
-                             int  /* Handle to the new tab */,
-                             int  /* Session Id of the new tab */)
-
-#if defined(OS_POSIX)
-  // TODO(estade): this should be merged with the windows message of the same
-  // name. See comment for WindowClick.
-  IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_WindowDrag,
-                             int, std::vector<gfx::Point>, int, bool, bool)
-#endif  // defined(OS_POSIX)
-
-  // This message gets the bounds of the window.
-  // Request:
-  //   int - the handle of the window to query
-  // Response:
-  //   gfx::Rect - the bounds of the window
-  //   bool - true if the query was successful
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_GetWindowBounds, int, gfx::Rect,
-                             bool)
-
-  // Simulate an end of session. Normally this happens when the user
-  // shuts down the machine or logs off.
-  // Request:
-  //   int - the handle of the browser
-  // Response:
-  //   bool - true if succesful
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_TerminateSession, int, bool)
-
-  // Returns whether the window is maximized.
-  // Request:
-  //   int - the handle of the window
-  // Response:
-  //   bool - true if the window is maximized
-  //   bool - true if query is successful
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_IsWindowMaximized, int, bool, bool)
-
-  IPC_MESSAGE_ROUTED2(AutomationMsg_SetPageFontSize,
-                      int /* tab_handle */,
-                      int /* The font size */)
-
-  // Returns a metric event duration that was last recorded.  Returns -1 if the
-  // event hasn't occurred yet.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_GetMetricEventDuration,
-                             std::string /* event_name */,
-                             int /* duration ms */)
-
-  // Sent by automation provider - go to history entry via automation.
-  IPC_MESSAGE_ROUTED2(AutomationMsg_RequestGoToHistoryEntryOffset,
-                             int,   // tab handle
-                             int)   // numbers of entries (negative or positive)
-
-  // Silently install the extension in the given crx file.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_InstallExtension,
-                             FilePath /* full path to crx file */,
-                             AutomationMsg_ExtensionResponseValues)
-
-  // Silently load the extension in the given directory.  This expects an
-  // extension expanded into the directory, not a crx file.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_LoadExpandedExtension,
-                             FilePath /* root directory of extension */,
-                             AutomationMsg_ExtensionResponseValues)
-
-  // Retrieves a list of the root directories of all enabled extensions
-  // that have been installed into Chrome by dropping a .crx file onto
-  // Chrome or an equivalent action (including loaded extensions).
-  // Other types of extensions are not included on the list (e.g. "component"
-  // or "external" extensions) since they are generally not useful for testing
-  // (e.g. an external extension could mess with an automated test if it's
-  // present on some systems only).
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_GetEnabledExtensions,
-                             std::vector<FilePath>)
-
-  // This message requests the type of the window with the given handle. The
-  // return value contains the type (Browser::Type), or -1 if the request
-  // failed.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_Type, int, int)
-
-  // Opens a new browser window of a specific type.
-  IPC_SYNC_MESSAGE_ROUTED2_0(AutomationMsg_OpenNewBrowserWindowOfType,
-                             int   /* Type (Browser::Type) */,
-                             bool  /* show */ )
-
-  // This message requests that the mouse be moved to this location, in
-  // window coordinate space.
-  // Request:
-  //   int - the handle of the window that's the context for this click
-  //   gfx::Point - the location to move to
-  IPC_MESSAGE_ROUTED2(AutomationMsg_WindowMouseMove, int, gfx::Point)
-
-  // Called when requests should be downloaded using a host browser's
-  // download mechanism when chrome is being embedded.
-  IPC_MESSAGE_ROUTED2(AutomationMsg_DownloadRequestInHost,
-                      int /* tab_handle */,
-                      int /* request_id */)
-
-  // Shuts down the session service for the browser identified by
-  // |browser_handle|. On success |result| is set to true.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ShutdownSessionService,
-                             int   /* browser_handle */,
-                             bool  /* result */)
-
-  IPC_MESSAGE_ROUTED1(AutomationMsg_SaveAsAsync,
-                      int /* tab handle */)
-
-#if defined(OS_WIN)
-  // An incoming message from an automation host to Chrome.  Signals that
-  // the browser containing |tab_handle| has moved.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_BrowserMove,
-                      int /* tab handle */)
+// Used to get cookies for the given URL.
+IPC_MESSAGE_ROUTED3(AutomationMsg_GetCookiesFromHost,
+                    int /* tab_handle */,
+                    GURL /* url */,
+                    int /* opaque_cookie_id */)
+
+IPC_MESSAGE_ROUTED5(AutomationMsg_GetCookiesHostResponse,
+                    int /* tab_handle */,
+                    bool /* success */,
+                    GURL /* url */,
+                    std::string /* cookies */,
+                    int /* opaque_cookie_id */)
+
+// If the given host is empty, then the default content settings are
+// modified.
+IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_SetContentSetting,
+                           int /* browser handle */,
+                           std::string /* host */,
+                           ContentSettingsType /* content type */,
+                           ContentSetting /* setting */,
+                           bool /* success */)
+
+#if defined(OS_CHROMEOS)
+// Logs in through the browser's login wizard if available.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_LoginWithUserAndPass,
+                           std::string /* username*/,
+                           std::string /* password*/,
+                           bool /* Whether successful*/)
 #endif
 
-  // Used to get cookies for the given URL.
-  IPC_MESSAGE_ROUTED3(AutomationMsg_GetCookiesFromHost,
-                      int /* tab_handle */,
-                      GURL /* url */,
-                      int /* opaque_cookie_id */)
-
-  IPC_MESSAGE_ROUTED5(AutomationMsg_GetCookiesHostResponse,
-                      int /* tab_handle */,
-                      bool /* success */,
-                      GURL /* url */,
-                      std::string /* cookies */,
-                      int /* opaque_cookie_id */)
-
-  // If the given host is empty, then the default content settings are
-  // modified.
-  IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_SetContentSetting,
-                             int /* browser handle */,
-                             std::string /* host */,
-                             ContentSettingsType /* content type */,
-                             ContentSetting /* setting */,
-                             bool /* success */)
-
-#if defined(OS_CHROMEOS)
-  // Logs in through the browser's login wizard if available.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_LoginWithUserAndPass,
-                             std::string /* username*/,
-                             std::string /* password*/,
-                             bool /* Whether successful*/)
-#endif
-
-  // Return the bookmarks encoded as a JSON string.
-  IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_GetBookmarksAsJSON,
-                             int /* browser_handle */,
-                             std::string /* bookmarks as a JSON string */,
-                             bool /* success */)
-
-  // Wait for the bookmark model to load.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WaitForBookmarkModelToLoad,
-                             int /* browser_handle */,
-                             bool /* success */)
-
-  // Bookmark addition, modification, and removal.
-  // Bookmarks are indexed by their id.
-  IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_AddBookmarkGroup,
-                             int /* browser_handle */,
-                             int64 /* parent_id */,
-                             int /* index */,
-                             std::wstring /* title */,
-                             bool /* success */)
-  IPC_SYNC_MESSAGE_ROUTED5_1(AutomationMsg_AddBookmarkURL,
-                             int /* browser_handle */,
-                             int64 /* parent_id */,
-                             int /* index */,
-                             std::wstring /* title */,
-                             GURL /* url */,
-                             bool /* success */)
-  IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_ReparentBookmark,
-                             int /* browser_handle */,
-                             int64 /* id */,
-                             int64 /* new_parent_id */,
-                             int /* index */,
-                             bool /* success */)
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetBookmarkTitle,
-                             int /* browser_handle */,
-                             int64 /* id */,
-                             std::wstring /* title */,
-                             bool /* success */)
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetBookmarkURL,
-                             int /* browser_handle */,
-                             int64 /* id */,
-                             GURL /* url */,
-                             bool /* success */)
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_RemoveBookmark,
-                             int /* browser_handle */,
-                             int64 /* id */,
-                             bool /* success */)
-
-  // This message informs the browser process to remove the history entries
-  // for the specified types across all time ranges. See
-  // browsing_data_remover.h for a list of REMOVE_* types supported in the
-  // remove_mask parameter.
-  IPC_MESSAGE_ROUTED1(AutomationMsg_RemoveBrowsingData, int)
-
-  // Block until the focused view id changes to something other than
-  // |previous_view_id|.
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_WaitForFocusedViewIDToChange,
-                             int /* window handle */,
-                             int /* previous_view_id */,
-                             bool /* success */,
-                             int /* new_view_id */)
-
-  // To avoid race conditions, waiting until a popup menu opens is a
-  // three-step process:
-  //   1. Call StartTrackingPopupMenus.
-  //   2. Call an automation method that results in opening the popup menu.
-  //   3. Call WaitForPopupMenuToOpen and check for success.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_StartTrackingPopupMenus,
-                             int /* browser handle */,
-                             bool /* success */)
-  IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_WaitForPopupMenuToOpen,
-                             bool /* success */)
-
-  // Generic pyauto pattern to help avoid future addition of
-  // automation messages.
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_SendJSONRequest,
-                             int /* browser_handle */,
-                             std::string /* JSON request */,
-                             std::string /* JSON response */,
-                             bool /* success */)
-
-  // Installs an extension from the crx file and returns its id.
-  // On error, |extension handle| will be 0.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_InstallExtensionAndGetHandle,
-                             FilePath     /* full path to crx file */,
-                             bool         /* with UI */,
-                             int          /* extension handle */)
-
-  // Waits for the next extension test result. Sets |test result| as the
-  // received result and |message| as any accompanying message with the
-  // result, which could be the empty string.
-  IPC_SYNC_MESSAGE_ROUTED0_2(AutomationMsg_WaitForExtensionTestResult,
-                             bool         /* test result */,
-                             std::string  /* message */)
-
-  // Uninstalls an extension. On success |success| is true.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_UninstallExtension,
-                             int   /* extension handle */,
-                             bool  /* success */)
-
-  // Enables an extension. On success |success| is true.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_EnableExtension,
-                             int   /* extension handle */,
-                             bool  /* success */)
-
-  // Disables an extension. On success |success| is true.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_DisableExtension,
-                             int   /* extension handle */,
-                             bool  /* success */)
-
-  // Executes the action associated with the given extension. This executes
-  // the extension's page or browser action in the given browser, but does
-  // not open popups. On success |success| is true.
-  IPC_SYNC_MESSAGE_ROUTED2_1(
-      AutomationMsg_ExecuteExtensionActionInActiveTabAsync,
-      int   /* extension handle */,
-      int   /* browser handle */,
-      bool  /* success */)
-
-  // Moves the browser action to the given index in the browser action toolbar.
-  // On success |success| is true.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_MoveExtensionBrowserAction,
-                             int   /* extension handle */,
-                             int   /* index */,
-                             bool  /* success */)
-
-  // Gets an extension property |property type|. On success |success| is true,
-  // and |property value| is set.
-  IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_GetExtensionProperty,
-      int                              /* extension handle */,
-      AutomationMsg_ExtensionProperty  /* property type */,
-      bool                             /* success */,
-      std::string                      /* property value */)
-
-  // Resets to the default theme.
-  IPC_SYNC_MESSAGE_ROUTED0_0(AutomationMsg_ResetToDefaultTheme)
-
-  // Navigates asynchronously to a URL with a certain disposition,
-  // like in a new tab.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_NavigationAsyncWithDisposition,
-                             int /* tab handle */,
-                             GURL,
-                             WindowOpenDisposition,
-                             bool /* result */)
-
-
-  // This message requests the cookie be deleted for given url in the
-  // profile of the tab identified by the first parameter.  The second
-  // parameter is the cookie name.
-  IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_DeleteCookie, GURL, std::string,
-                             int /* tab handle */,
-                             bool /* result */)
-
-  // This message triggers the collected cookies dialog for a specific tab.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ShowCollectedCookiesDialog,
-                             int /* tab handle */,
-                             bool /* result */)
-
-  // This message requests the external tab identified by the tab handle
-  // passed in be closed.
-  // Request:
-  //   -int: Tab handle
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED1(AutomationMsg_CloseExternalTab, int)
-
-  // This message requests that the external tab identified by the tab handle
-  // runs unload handlers if any on the current page.
-  // Request:
-  //   -int: Tab handle
-  //   -bool: result: true->unload, false->don't unload
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_RunUnloadHandlers, int, bool)
-
-  // This message sets the current zoom level on the tab
-  // Request:
-  //   -int: Tab handle
-  //   -int: Zoom level. Values ZOOM_OUT = -1, RESET = 0, ZOOM_IN  = 1
-  // Response:
-  //   None expected
-  IPC_MESSAGE_ROUTED2(AutomationMsg_SetZoomLevel, int, int)
-
-  // Waits for tab count to reach target value.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WaitForTabCountToBecome,
-                             int /* browser handle */,
-                             int /* target tab count */,
-                             bool /* success */)
-
-  // Waits for the infobar count to reach given number.
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WaitForInfoBarCount,
-                             int /* tab handle */,
-                             int /* target count */,
-                             bool /* success */)
-
-  // Waits for the autocomplete edit to receive focus.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WaitForAutocompleteEditFocus,
-                             int /* autocomplete edit handle */,
-                             bool /* success */)
-
-  // Loads all blocked plug-ins on the page.
-  IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_LoadBlockedPlugins,
-                             int /* tab handle */,
-                             bool /* success */)
-
-  // Captures the entire page for the tab, including those portions not in
-  // view, and saves the image as a PNG in the given file location.
-  // Request:
-  //   -int: Tab handle
-  //   -FilePath: Path to save the captured image to
-  // Response:
-  //   -bool: Whether the method succeeded
-  IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_CaptureEntirePageAsPNG, int,
-                             FilePath, bool)
-
-IPC_END_MESSAGES(Automation)
+// Return the bookmarks encoded as a JSON string.
+IPC_SYNC_MESSAGE_ROUTED1_2(AutomationMsg_GetBookmarksAsJSON,
+                           int /* browser_handle */,
+                           std::string /* bookmarks as a JSON string */,
+                           bool /* success */)
+
+// Wait for the bookmark model to load.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WaitForBookmarkModelToLoad,
+                           int /* browser_handle */,
+                           bool /* success */)
+
+// Bookmark addition, modification, and removal.
+// Bookmarks are indexed by their id.
+IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_AddBookmarkGroup,
+                           int /* browser_handle */,
+                           int64 /* parent_id */,
+                           int /* index */,
+                           std::wstring /* title */,
+                           bool /* success */)
+IPC_SYNC_MESSAGE_ROUTED5_1(AutomationMsg_AddBookmarkURL,
+                           int /* browser_handle */,
+                           int64 /* parent_id */,
+                           int /* index */,
+                           std::wstring /* title */,
+                           GURL /* url */,
+                           bool /* success */)
+IPC_SYNC_MESSAGE_ROUTED4_1(AutomationMsg_ReparentBookmark,
+                           int /* browser_handle */,
+                           int64 /* id */,
+                           int64 /* new_parent_id */,
+                           int /* index */,
+                           bool /* success */)
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetBookmarkTitle,
+                           int /* browser_handle */,
+                           int64 /* id */,
+                           std::wstring /* title */,
+                           bool /* success */)
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_SetBookmarkURL,
+                           int /* browser_handle */,
+                           int64 /* id */,
+                           GURL /* url */,
+                           bool /* success */)
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_RemoveBookmark,
+                           int /* browser_handle */,
+                           int64 /* id */,
+                           bool /* success */)
+
+// This message informs the browser process to remove the history entries
+// for the specified types across all time ranges. See
+// browsing_data_remover.h for a list of REMOVE_* types supported in the
+// remove_mask parameter.
+IPC_MESSAGE_ROUTED1(AutomationMsg_RemoveBrowsingData, int)
+
+// Block until the focused view id changes to something other than
+// |previous_view_id|.
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_WaitForFocusedViewIDToChange,
+                           int /* window handle */,
+                           int /* previous_view_id */,
+                           bool /* success */,
+                           int /* new_view_id */)
+
+// To avoid race conditions, waiting until a popup menu opens is a
+// three-step process:
+//   1. Call StartTrackingPopupMenus.
+//   2. Call an automation method that results in opening the popup menu.
+//   3. Call WaitForPopupMenuToOpen and check for success.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_StartTrackingPopupMenus,
+                           int /* browser handle */,
+                           bool /* success */)
+IPC_SYNC_MESSAGE_ROUTED0_1(AutomationMsg_WaitForPopupMenuToOpen,
+                           bool /* success */)
+
+// Generic pyauto pattern to help avoid future addition of
+// automation messages.
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_SendJSONRequest,
+                           int /* browser_handle */,
+                           std::string /* JSON request */,
+                           std::string /* JSON response */,
+                           bool /* success */)
+
+// Installs an extension from the crx file and returns its id.
+// On error, |extension handle| will be 0.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_InstallExtensionAndGetHandle,
+                           FilePath     /* full path to crx file */,
+                           bool         /* with UI */,
+                           int          /* extension handle */)
+
+// Waits for the next extension test result. Sets |test result| as the
+// received result and |message| as any accompanying message with the
+// result, which could be the empty string.
+IPC_SYNC_MESSAGE_ROUTED0_2(AutomationMsg_WaitForExtensionTestResult,
+                           bool         /* test result */,
+                           std::string  /* message */)
+
+// Uninstalls an extension. On success |success| is true.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_UninstallExtension,
+                           int   /* extension handle */,
+                           bool  /* success */)
+
+// Enables an extension. On success |success| is true.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_EnableExtension,
+                           int   /* extension handle */,
+                           bool  /* success */)
+
+// Disables an extension. On success |success| is true.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_DisableExtension,
+                           int   /* extension handle */,
+                           bool  /* success */)
+
+// Executes the action associated with the given extension. This executes
+// the extension's page or browser action in the given browser, but does
+// not open popups. On success |success| is true.
+IPC_SYNC_MESSAGE_ROUTED2_1(
+    AutomationMsg_ExecuteExtensionActionInActiveTabAsync,
+    int   /* extension handle */,
+    int   /* browser handle */,
+    bool  /* success */)
+
+// Moves the browser action to the given index in the browser action toolbar.
+// On success |success| is true.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_MoveExtensionBrowserAction,
+                           int   /* extension handle */,
+                           int   /* index */,
+                           bool  /* success */)
+
+// Gets an extension property |property type|. On success |success| is true,
+// and |property value| is set.
+IPC_SYNC_MESSAGE_ROUTED2_2(AutomationMsg_GetExtensionProperty,
+    int                              /* extension handle */,
+    AutomationMsg_ExtensionProperty  /* property type */,
+    bool                             /* success */,
+    std::string                      /* property value */)
+
+// Resets to the default theme.
+IPC_SYNC_MESSAGE_ROUTED0_0(AutomationMsg_ResetToDefaultTheme)
+
+// Navigates asynchronously to a URL with a certain disposition,
+// like in a new tab.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_NavigationAsyncWithDisposition,
+                           int /* tab handle */,
+                           GURL,
+                           WindowOpenDisposition,
+                           bool /* result */)
+
+
+// This message requests the cookie be deleted for given url in the
+// profile of the tab identified by the first parameter.  The second
+// parameter is the cookie name.
+IPC_SYNC_MESSAGE_ROUTED3_1(AutomationMsg_DeleteCookie, GURL, std::string,
+                           int /* tab handle */,
+                           bool /* result */)
+
+// This message triggers the collected cookies dialog for a specific tab.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_ShowCollectedCookiesDialog,
+                           int /* tab handle */,
+                           bool /* result */)
+
+// This message requests the external tab identified by the tab handle
+// passed in be closed.
+// Request:
+//   -int: Tab handle
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED1(AutomationMsg_CloseExternalTab, int)
+
+// This message requests that the external tab identified by the tab handle
+// runs unload handlers if any on the current page.
+// Request:
+//   -int: Tab handle
+//   -bool: result: true->unload, false->don't unload
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_RunUnloadHandlers, int, bool)
+
+// This message sets the current zoom level on the tab
+// Request:
+//   -int: Tab handle
+//   -int: Zoom level. Values ZOOM_OUT = -1, RESET = 0, ZOOM_IN  = 1
+// Response:
+//   None expected
+IPC_MESSAGE_ROUTED2(AutomationMsg_SetZoomLevel, int, int)
+
+// Waits for tab count to reach target value.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WaitForTabCountToBecome,
+                           int /* browser handle */,
+                           int /* target tab count */,
+                           bool /* success */)
+
+// Waits for the infobar count to reach given number.
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_WaitForInfoBarCount,
+                           int /* tab handle */,
+                           int /* target count */,
+                           bool /* success */)
+
+// Waits for the autocomplete edit to receive focus.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_WaitForAutocompleteEditFocus,
+                           int /* autocomplete edit handle */,
+                           bool /* success */)
+
+// Loads all blocked plug-ins on the page.
+IPC_SYNC_MESSAGE_ROUTED1_1(AutomationMsg_LoadBlockedPlugins,
+                           int /* tab handle */,
+                           bool /* success */)
+
+// Captures the entire page for the tab, including those portions not in
+// view, and saves the image as a PNG in the given file location.
+// Request:
+//   -int: Tab handle
+//   -FilePath: Path to save the captured image to
+// Response:
+//   -bool: Whether the method succeeded
+IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_CaptureEntirePageAsPNG, int,
+                           FilePath, bool)