Implement the frame id required for the web navigation api.

chrome/common/render_messages_params.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.
 
 #ifndef CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_
 #define CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 187 matching lines @@
 struct ViewHostMsg_FrameNavigate_Params {
   ViewHostMsg_FrameNavigate_Params();
   ~ViewHostMsg_FrameNavigate_Params();
 
   // Page ID of this navigation. The renderer creates a new unique page ID
   // anytime a new session history entry is created. This means you'll get new
   // page IDs for user actions, and the old page IDs will be reloaded when
   // iframes are loaded automatically.
   int32 page_id;
 
+  // The frame ID for this navigation. The frame ID uniquely identifies the
+  // frame the navigation happened in for a given renderer.
+  long long frame_id;
+
   // URL of the page being loaded.
   GURL url;
 
   // URL of the referrer of this load. WebKit generates this based on the
   // source of the event that caused the load.
   GURL referrer;
 
   // The type of transition.
   PageTransition::Type transition;
 
@@ skipping 1057 matching lines @@
 struct ParamTraits<ViewHostMsg_AccessibilityNotification_Params> {
   typedef ViewHostMsg_AccessibilityNotification_Params param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m, void** iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };
 
 }  // namespace IPC
 
 #endif  // CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_