Record UMA stats for subframes history navigations.

content/browser/frame_host/navigator.h

 // Copyright 2013 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_FRAME_HOST_NAVIGATOR_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/navigator_delegate.h"
@@ skipping 83 matching lines @@
   virtual bool NavigateToPendingEntry(FrameTreeNode* frame_tree_node,
                                       const FrameNavigationEntry& frame_entry,
                                       ReloadType reload_type,
                                       bool is_same_document_history_load);
 
   // Called on a newly created subframe during a history navigation. The browser
   // process looks up the corresponding FrameNavigationEntry for the new frame
   // navigates it in the correct process. Returns false if the
   // FrameNavigationEntry can't be found or the navigation fails. This is only
   // used in OOPIF-enabled modes.
-  virtual bool NavigateNewChildFrame(RenderFrameHostImpl* render_frame_host);
+  // TODO(creis): Remove |default_url| once we have collected UMA stats on the
+  // cases that we use a different URL from history than the frame's src.
+  virtual bool NavigateNewChildFrame(RenderFrameHostImpl* render_frame_host,
+                                     const GURL& default_url);
 
   // Navigation requests -------------------------------------------------------
 
   virtual base::TimeTicks GetCurrentLoadStart();
 
   // The RenderFrameHostImpl has received a request to open a URL with the
   // specified |disposition|.
   virtual void RequestOpenURL(
       RenderFrameHostImpl* render_frame_host,
       const GURL& url,
@@ skipping 78 matching lines @@
   virtual void DiscardPendingEntryIfNeeded(NavigationHandleImpl* handle) {}
 
  protected:
   friend class base::RefCounted<Navigator>;
   virtual ~Navigator() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_