Remove WebContentsObserver::ProvisionalChangeToMainFrameUrl and all the code supporting it.

content/browser/web_contents/web_contents_impl.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_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 484 matching lines @@
       RenderFrameHostImpl* render_frame_host) OVERRIDE;
   virtual void DidFailProvisionalLoadWithError(
       RenderFrameHostImpl* render_frame_host,
       const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params)
       OVERRIDE;
   virtual void DidFailLoadWithError(
       RenderFrameHostImpl* render_frame_host,
       const GURL& url,
       int error_code,
       const base::string16& error_description) OVERRIDE;
-  virtual void DidRedirectProvisionalLoad(
-      RenderFrameHostImpl* render_frame_host,
-      const GURL& validated_target_url) OVERRIDE;
   virtual void DidCommitProvisionalLoad(
       RenderFrameHostImpl* render_frame_host,
       const GURL& url,
       ui::PageTransition transition_type) OVERRIDE;
   virtual void DidNavigateMainFramePreCommit(
       bool navigation_is_within_page) OVERRIDE;
   virtual void DidNavigateMainFramePostCommit(
       const LoadCommittedDetails& details,
       const FrameHostMsg_DidCommitProvisionalLoad_Params& params) OVERRIDE;
   virtual void DidNavigateAnyFramePostCommit(
@@ skipping 724 matching lines @@
   AudioStreamMonitor audio_stream_monitor_;
 
   base::WeakPtrFactory<WebContentsImpl> loading_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_