Browser plugin: Implement titleChanged event.

content/common/browser_plugin_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message header, no traditional include guard.
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/process.h"
@@ skipping 189 matching lines @@
 // the embedder through the BrowserPluginMsg_DidCommit message.
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_LoadCommit,
                      int /* instance_id */,
                      BrowserPluginMsg_LoadCommit_Params)
 
 // When the guest page has completed loading (including subframes), the browser
 // process informs the embedder through the BrowserPluginMsg_LoadStop message.
 IPC_MESSAGE_CONTROL1(BrowserPluginMsg_LoadStop,
                      int /* instance_id */)
 
+// When the guest changes its title, the browser process informs the
+// embedder through the BrowserPluginMsg_TitleChange message.
+IPC_MESSAGE_CONTROL2(BrowserPluginMsg_TitleChange,
+                     int /* instance_id */,
+                     string16 /* title */)
+
 // When the guest crashes, the browser process informs the embedder through this
 // message.
 IPC_MESSAGE_CONTROL3(BrowserPluginMsg_GuestGone,
                      int /* instance_id */,
                      int /* process_id */,
                      int /* This is really base::TerminationStatus */)
 
 IPC_STRUCT_BEGIN(BrowserPluginMsg_UpdateRect_Params)
   // The position and size of the bitmap.
   IPC_STRUCT_MEMBER(gfx::Rect, bitmap_rect)
@@ skipping 40 matching lines @@
 IPC_MESSAGE_CONTROL2(BrowserPluginMsg_ShouldAcceptTouchEvents,
                      int /* instance_id */,
                      bool /* accept */)
 
 // The guest has damage it wants to convey to the embedder so that it can
 // update its backing store.
 IPC_MESSAGE_CONTROL3(BrowserPluginMsg_UpdateRect,
                      int /* instance_id */,
                      int /* message_id */,
                      BrowserPluginMsg_UpdateRect_Params)