Move guest_view to extensions.

chrome/browser/guest_view/web_view/javascript_dialog_helper.h

 // Copyright 2014 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_GUEST_VIEW_WEB_VIEW_JAVASCRIPT_DIALOG_HELPER_H_
 #define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_JAVASCRIPT_DIALOG_HELPER_H_
 
 #include "content/public/browser/javascript_dialog_manager.h"
 
+namespace extensions {
+
 class WebViewGuest;
 
 class JavaScriptDialogHelper : public content::JavaScriptDialogManager {
  public:
   explicit JavaScriptDialogHelper(WebViewGuest* guest);
   virtual ~JavaScriptDialogHelper();
 
   // JavaScriptDialogManager implementation.
   virtual void RunJavaScriptDialog(
       content::WebContents* web_contents,
@@ skipping 23 matching lines @@
       const DialogClosedCallback& callback,
       bool allow,
       const std::string& user_input);
 
   // Pointer to the webview that is being helped.
   WebViewGuest* const web_view_guest_;
 
   DISALLOW_COPY_AND_ASSIGN(JavaScriptDialogHelper);
 };
 
+}  // namespace extensions
+
 #endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_JAVASCRIPT_DIALOG_HELPER_H_