Adds support for calling postMessage on a frame living in a different renderer.

content/browser/renderer_host/render_view_host_impl.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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
 class PowerSaveBlocker;
 class SessionStorageNamespaceImpl;
 class SkBitmap;
 class ViewMsg_Navigate;
 struct AccessibilityHostMsg_NotificationParams;
 struct MediaPlayerAction;
 struct ViewHostMsg_CreateWindow_Params;
 struct ViewHostMsg_DidFailProvisionalLoadWithError_Params;
 struct ViewHostMsg_ShowPopup_Params;
 struct ViewMsg_Navigate_Params;
+struct ViewHostMsg_PostMessage_Params;
 struct ViewMsg_StopFinding_Params;
 
 namespace base {
 class ListValue;
 }
 
 namespace content {
 class TestRenderViewHost;
 }
 
@@ skipping 428 matching lines @@
   void OnMsgDidChangeScrollOffsetPinningForMainFrame(bool is_pinned_to_left,
                                                      bool is_pinned_to_right);
   void OnMsgDidChangeNumWheelEvents(int count);
   void OnMsgSelectionChanged(const string16& text,
                              size_t offset,
                              const ui::Range& range);
   void OnMsgSelectionBoundsChanged(const gfx::Rect& start_rect,
                                    const gfx::Rect& end_rect);
   void OnMsgPasteFromSelectionClipboard();
   void OnMsgRouteCloseEvent();
+  void OnMsgRouteMessageEvent(const ViewHostMsg_PostMessage_Params& params);
   void OnMsgRunJavaScriptMessage(const string16& message,
                                  const string16& default_prompt,
                                  const GURL& frame_url,
                                  ui::JavascriptMessageType type,
                                  IPC::Message* reply_msg);
   void OnMsgRunBeforeUnloadConfirm(const GURL& frame_url,
                                    const string16& message,
                                    bool is_reload,
                                    IPC::Message* reply_msg);
   void OnMsgStartDragging(const WebDropData& drop_data,
@@ skipping 148 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_