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

content/browser/web_contents/web_contents_impl.cc

 // 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 2451 matching lines @@
     RenderFrameHostImpl* render_frame_host,
     const GURL& validated_url,
     bool is_error_page,
     bool is_iframe_srcdoc) {
   // Notify observers about the start of the provisional load.
   FOR_EACH_OBSERVER(
       WebContentsObserver,
       observers_,
       DidStartProvisionalLoadForFrame(
           render_frame_host, validated_url, is_error_page, is_iframe_srcdoc));
-
-  if (!render_frame_host->GetParent()) {
-    FOR_EACH_OBSERVER(
-        WebContentsObserver,
-        observers_,
-        ProvisionalChangeToMainFrameUrl(validated_url,
-                                        render_frame_host));
-  }
 }
 
 void WebContentsImpl::DidStartNavigationTransition(
     RenderFrameHostImpl* render_frame_host) {
 #if defined(OS_ANDROID)
   int render_frame_id = render_frame_host->GetRoutingID();
   GetWebContentsAndroid()->DidStartNavigationTransitionForFrame(
       render_frame_id);
 #endif
 }
@@ skipping 63 matching lines @@
                                           source_render_frame_id));
   }
 }
 
 bool WebContentsImpl::ShouldPreserveAbortedURLs() {
   if (!delegate_)
     return false;
   return delegate_->ShouldPreserveAbortedURLs(this);
 }
 
-void WebContentsImpl::DidRedirectProvisionalLoad(
-    RenderFrameHostImpl* render_frame_host,
-    const GURL& validated_target_url) {
-  // Notify observers about the provisional change in the main frame URL.
-  FOR_EACH_OBSERVER(
-      WebContentsObserver,
-      observers_,
-      ProvisionalChangeToMainFrameUrl(validated_target_url,
-                                      render_frame_host));
-}
-
 void WebContentsImpl::DidCommitProvisionalLoad(
     RenderFrameHostImpl* render_frame_host,
     const GURL& url,
     ui::PageTransition transition_type) {
   // Notify observers about the commit of the provisional load.
   FOR_EACH_OBSERVER(WebContentsObserver,
                     observers_,
                     DidCommitProvisionalLoadForFrame(
                         render_frame_host, url, transition_type));
 }
@@ skipping 1782 matching lines @@
   node->render_manager()->ResumeResponseDeferredAtStart();
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content