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

content/renderer/render_frame_impl.cc

 // 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 2020 matching lines @@
   FOR_EACH_OBSERVER(RenderFrameObserver, observers_, DidStartProvisionalLoad());
 
   Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
        routing_id_, ds->request().url(), is_transition_navigation));
 }
 
 void RenderFrameImpl::didReceiveServerRedirectForProvisionalLoad(
     blink::WebLocalFrame* frame) {
   DCHECK(!frame_ || frame_ == frame);
   render_view_->history_controller()->RemoveChildrenForRedirect(this);
-  if (frame->parent())
-    return;
-  // Received a redirect on the main frame.
-  WebDataSource* data_source = frame->provisionalDataSource();
-  if (!data_source) {
-    // Should only be invoked when we have a data source.
-    NOTREACHED();
-    return;
-  }
-  std::vector<GURL> redirects;
-  GetRedirectChain(data_source, &redirects);
-  if (redirects.size() >= 2) {
-    Send(new FrameHostMsg_DidRedirectProvisionalLoad(
-        routing_id_,
-        render_view_->page_id_,
-        redirects[redirects.size() - 2],
-        redirects.back()));
-  }
 }
 
 void RenderFrameImpl::didFailProvisionalLoad(blink::WebLocalFrame* frame,
                                              const blink::WebURLError& error) {
   TRACE_EVENT1("navigation", "RenderFrameImpl::didFailProvisionalLoad",
                "id", routing_id_);
   DCHECK(!frame_ || frame_ == frame);
   WebDataSource* ds = frame->provisionalDataSource();
   DCHECK(ds);
 
@@ skipping 1854 matching lines @@
 
 #if defined(ENABLE_BROWSER_CDMS)
 RendererCdmManager* RenderFrameImpl::GetCdmManager() {
   if (!cdm_manager_)
     cdm_manager_ = new RendererCdmManager(this);
   return cdm_manager_;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
 }  // namespace content