Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 79bfc23617a65e403d8da9b7f5cc2c7bda3ddeb6..04719d72d952ac2178ac60ae3454b2099143145a 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -300,12 +300,6 @@ class CONTENT_EXPORT WebContentsImpl
                                     base::TerminationStatus status,
                                     int error_code) OVERRIDE;
   virtual void RenderViewDeleted(RenderViewHost* render_view_host) OVERRIDE;
-  virtual void DidStartProvisionalLoadForFrame(
-      RenderViewHost* render_view_host,
-      int64 frame_id,
-      int64 parent_frame_id,
-      bool main_frame,
-      const GURL& url) OVERRIDE;
   virtual void DidRedirectProvisionalLoad(
       RenderViewHost* render_view_host,
       int32 page_id,
@@ -440,6 +434,19 @@ class CONTENT_EXPORT WebContentsImpl
       SiteInstance* instance) OVERRIDE;
   virtual FrameTree* GetFrameTree() OVERRIDE;
 
+  // NavigatorDelegate ---------------------------------------------------------
+
+  virtual void DidStartProvisionalLoad(
+      RenderFrameHostImpl* render_frame_host,
+      int64 frame_id,
+      int64 parent_frame_id,
+      bool is_main_frame,
+      const GURL& validated_url,
+      bool is_error_page,
+      bool is_iframe_srcdoc) OVERRIDE;
+  virtual void NotifyChangedNavigationState(
+      InvalidateTypes changed_flags) OVERRIDE;
+
   // RenderWidgetHostDelegate --------------------------------------------------
 
   virtual void RenderWidgetDeleted(