Fix license headers in a number of files

chrome/renderer/loadtimes_extension_bindings.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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.
 
 // The LoadTimesExtension is a v8 extension to access the time it took
 // to load a page.
 
 #ifndef CHROME_RENDERER_LOADTIMES_EXTENSION_BINDINGS_H_
 #define CHROME_RENDERER_LOADTIMES_EXTENSION_BINDINGS_H_
 
 namespace v8 {
 class Extension;
 }
 
 namespace extensions_v8 {
 
 class LoadTimesExtension {
  public:
   static v8::Extension* Get();
 };
 
 }  // namespace extensions_v8
 
 #endif  // CHROME_RENDERER_LOADTIMES_EXTENSION_BINDINGS_H_