browser: Put simple_message_box.h and chrome_web_contents_view_delegate.h into chrome namespace.

chrome/browser/ui/tab_contents/chrome_web_contents_view_delegate.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 CHROME_BROWSER_UI_TAB_CONTENTS_CHROME_WEB_CONTENTS_VIEW_DELEGATE_H_
 #define CHROME_BROWSER_UI_TAB_CONTENTS_CHROME_WEB_CONTENTS_VIEW_DELEGATE_H_
 #pragma once
 
 namespace content {
 class WebContents;
-class WebContentsViewMacDelegate;
+class WebContentsViewDelegate;
 }
 
-namespace browser {
+namespace chrome {
 
 content::WebContentsViewDelegate* CreateWebContentsViewDelegate(
     content::WebContents* web_contents);
 
-}  // namespace
+}  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_TAB_CONTENTS_CHROME_WEB_CONTENTS_VIEW_DELEGATE_H_