Add RenderViewHost* to DidStartLoading and DidStopLoading in

chrome/browser/tab_contents/thumbnail_generator.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 "chrome/browser/tab_contents/thumbnail_generator.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/bind.h"
@@ skipping 547 matching lines @@
   // Skip if we don't have to udpate the temporary thumbnail (i.e. the one
   // not yet saved).
   ThumbnailScore temporary_score;
   if (top_sites->GetTemporaryPageThumbnailScore(url, &temporary_score) &&
       !temporary_score.ShouldConsiderUpdating())
     return false;
 
   return true;
 }
 
-void ThumbnailGenerator::DidStartLoading() {
+void ThumbnailGenerator::DidStartLoading(
+    content::RenderViewHost* render_view_host) {
   load_interrupted_ = false;
 }
 
 void ThumbnailGenerator::StopNavigation() {
   // This function gets called when the page loading is interrupted by the
   // stop button.
   load_interrupted_ = true;
 }