Navigation transitions: Pass is_transition_navigation flag up to the embedder

content/browser/frame_host/navigator_delegate.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_DELEGATE_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_
 
 #include "base/strings/string16.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
@@ skipping 16 matching lines @@
  public:
   // The RenderFrameHost started a provisional load for the frame
   // represented by |render_frame_host|.
   virtual void DidStartProvisionalLoad(
       RenderFrameHostImpl* render_frame_host,
       int parent_routing_id,
       const GURL& validated_url,
       bool is_error_page,
       bool is_iframe_srcdoc) {}
 
+  virtual void DidStartNavigationTransition(
+      RenderFrameHostImpl* render_frame_host) {}
+
   // A provisional load in |render_frame_host| failed.
   virtual void DidFailProvisionalLoadWithError(
       RenderFrameHostImpl* render_frame_host,
       const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {}
 
   // Document load in |render_frame_host| failed.
   virtual void DidFailLoadWithError(
       RenderFrameHostImpl* render_frame_host,
       const GURL& url,
       int error_code,
@@ skipping 53 matching lines @@
                               const OpenURLParams& params) {}
 
   // Returns whether URLs for aborted browser-initiated navigations should be
   // preserved in the omnibox.  Defaults to false.
   virtual bool ShouldPreserveAbortedURLs();
 };
 
 }  // namspace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_DELEGATE_H_