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

content/public/test/browser_test_utils.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_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 
 #include <queue>
 #include <string>
 #include <vector>
@@ skipping 257 matching lines @@
   // Adds another title to watch for.
   void AlsoWaitForTitle(const base::string16& expected_title);
 
   // Waits until the title matches either expected_title or one of the titles
   // added with AlsoWaitForTitle. Returns the value of the most recently
   // observed matching title.
   const base::string16& WaitAndGetTitle() WARN_UNUSED_RESULT;
 
  private:
   // Overridden WebContentsObserver methods.
-  void DidStopLoading(RenderViewHost* render_view_host) override;
+  void DidStopLoading() override;
   void TitleWasSet(NavigationEntry* entry, bool explicit_set) override;
 
   void TestTitle();
 
   std::vector<base::string16> expected_titles_;
   scoped_refptr<MessageLoopRunner> message_loop_runner_;
 
   // The most recently observed expected title, if any.
   base::string16 observed_title_;
 
@@ skipping 105 matching lines @@
   WebContents* web_contents_;
   scoped_ptr<RenderViewCreatedObserver> child_observer_;
   scoped_refptr<MessageLoopRunner> runner_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsAddedObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_