Remove RenderViewHost parameter from WebContentsObserver::Did{Start|Stop}Loading.

chrome/browser/prerender/prerender_browsertest.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 <deque>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 293 matching lines @@
 
   void set_did_start_loading() {
     did_start_loading_ = true;
   }
 
   void Wait() {
     loop_.Run();
   }
 
   // WebContentsObserver implementation:
-  void DidStartLoading(RenderViewHost* render_view_host) override {
-    did_start_loading_ = true;
-  }
-  void DidStopLoading(RenderViewHost* render_view_host) override {
+  void DidStartLoading() override { did_start_loading_ = true; }
+  void DidStopLoading() override {
     if (!did_start_loading_)
       return;
     number_of_loads_--;
     if (number_of_loads_ == 0)
       loop_.Quit();
   }
 
   // TabStripModelObserver implementation:
   void TabReplacedAt(TabStripModel* tab_strip_model,
                      WebContents* old_contents,
@@ skipping 3846 matching lines @@
   TestShouldDisableLocalPredictorPreferenceNetworkMatrix(
       true /*preference_wifi_network_wifi*/,
       true /*preference_wifi_network_4g*/,
       true /*preference_always_network_wifi*/,
       false /*preference_always_network_4g*/,
       true /*preference_never_network_wifi*/,
       true /*preference_never_network_4g*/);
 }
 
 }  // namespace prerender