Take 2 at this. The only change between this and the first is to add the GetT...

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 346 matching lines @@
   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.
@@ skipping 759 matching lines @@
   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)
 
+  // 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 */ )
+
 
 IPC_END_MESSAGES(Automation)