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

content/public/test/test_navigation_observer.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/public/test/test_navigation_observer.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
@@ skipping 20 matching lines @@
   }
 
   void DidAttachInterstitialPage() override {
     parent_->OnDidAttachInterstitialPage(web_contents());
   }
 
   void WebContentsDestroyed() override {
     parent_->OnWebContentsDestroyed(this, web_contents());
   }
 
-  void DidStartLoading(RenderViewHost* render_view_host) override {
+  void DidStartLoading() override {
     parent_->OnDidStartLoading(web_contents());
   }
 
-  void DidStopLoading(RenderViewHost* render_view_host) override {
+  void DidStopLoading() override {
     parent_->OnDidStopLoading(web_contents());
   }
 
   void DidStartProvisionalLoadForFrame(RenderFrameHost* render_frame_host,
                                        const GURL& validated_url,
                                        bool is_error_page,
                                        bool is_iframe_srcdoc) override {
     parent_->OnDidStartProvisionalLoadForFrame(
         render_frame_host, validated_url, is_error_page, is_iframe_srcdoc);
   }
@@ skipping 134 matching lines @@
 
 void TestNavigationObserver::OnDidCommitProvisionalLoadForFrame(
     RenderFrameHost* render_frame_host,
     const GURL& url,
     ui::PageTransition transition_type) {
   last_navigation_url_ = url;
   last_navigation_succeeded_ = true;
 }
 
 }  // namespace content