Navigation transitions: Pass is_transition_navigation flag up to the embedder

content/browser/android/content_view_core_impl.h

Index: content/browser/android/content_view_core_impl.h
diff --git a/content/browser/android/content_view_core_impl.h b/content/browser/android/content_view_core_impl.h
index a033f217b5e9560b0aecf07743f4a30bd3fa1d53..7624c74887479bfcba47634aadfa227e6fbb4a0b 100644
--- a/content/browser/android/content_view_core_impl.h
+++ b/content/browser/android/content_view_core_impl.h
@@ -231,6 +231,9 @@ class ContentViewCoreImpl : public ContentViewCore,
   // determine if the embedder intends to handle it.
   bool WillHandleDeferAfterResponseStarted();
 
+  // This method is invoked when a navigation transition has started.
+  void DidStartNavigationTransitionForFrame(int64 frame_id);
+
   void OnSmartClipDataExtracted(const base::string16& text,
                                 const base::string16& html,
                                 const gfx::Rect& clip_rect);