When Chrome hands off a URL to be opened by the external host by the ViewHost...

chrome/test/automation/automation_messages_internal.h

 // Copyright (c) 2006-2008 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.
 
@@ skipping 415 matching lines @@
   //   ExternalTabSettings - settings for external tab
   IPC_SYNC_MESSAGE_ROUTED1_3(AutomationMsg_CreateExternalTab,
                              IPC::ExternalTabSettings  /* settings*/,
                              gfx::NativeWindow  /* Tab container window */,
                              gfx::NativeWindow  /* Tab window */,
                              int  /* Handle to 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_ROUTED2_1(AutomationMsg_NavigateInExternalTab, int, GURL,
+  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,
@@ skipping 96 matching lines @@
   //      false: Focus will be set to the first focusable element
   // Response:
   //   None expected
   IPC_MESSAGE_ROUTED2(AutomationMsg_SetInitialFocus, int, 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_ROUTED3(AutomationMsg_OpenURL, int, GURL, int)
+  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.
@@ skipping 549 matching lines @@
                              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)
 
 
 IPC_END_MESSAGES(Automation)