When starting a provisional load include the parent frame ID in the IPC and pass it down the th WCO…

content/public/browser/web_contents_observer.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_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
 #include "base/callback_forward.h"
 #include "base/process_util.h"
 #include "content/common/content_export.h"
@@ skipping 31 matching lines @@
   virtual void NavigateToPendingEntry(
       const GURL& url,
       NavigationController::ReloadType reload_type) {}
   virtual void DidNavigateMainFrame(
       const LoadCommittedDetails& details,
       const FrameNavigateParams& params) {}
   virtual void DidNavigateAnyFrame(
       const LoadCommittedDetails& details,
       const FrameNavigateParams& params) {}
   // |render_view_host| is the RenderViewHost for which the provisional load is
-  // happening.
+  // happening. |frame_id| is a positive, non-zero integer identifying the
+  // navigating frame in the given |render_view_host|. |parent_frame_id| is the
+  // frame identifier of the frame containing the navigating frame, or -1 if the
+  // frame is not contained in another frame.
   virtual void DidStartProvisionalLoadForFrame(
       int64 frame_id,
+      int64 parent_frame_id,
       bool is_main_frame,
       const GURL& validated_url,
       bool is_error_page,
       RenderViewHost* render_view_host) {}
   virtual void ProvisionalChangeToMainFrameUrl(
       const GURL& url,
       const GURL& opener_url,
       RenderViewHost* render_view_host) {}
   virtual void DidCommitProvisionalLoadForFrame(
       int64 frame_id,
@@ skipping 113 matching lines @@
   void WebContentsImplDestroyed();
 
   WebContentsImpl* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_