Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal_dialogs/javascript_dialog_extensions_client.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 COMPONENTS_APP_MODAL_DIALOGS_JAVASCRIPT_DIALOG_EXTENSIONS_CLIENT_H_
 #define COMPONENTS_APP_MODAL_DIALOGS_JAVASCRIPT_DIALOG_EXTENSIONS_CLIENT_H_
 
 #include <string>
 
 class GURL;
 
 namespace content {
 class WebContents;
 }
 
+namespace app_modal_dialogs {
+
 // A client interface to access and control extensions/apps
 // that opened a JavaScript dialog.
 class JavaScriptDialogExtensionsClient {
  public:
   virtual ~JavaScriptDialogExtensionsClient() {}
 
   // Called when the extension associated with |web_contents| opened
   // a dialog.
   virtual void OnDialogOpened(content::WebContents* web_contents) = 0;
 
   // Called when a dialog created by the extension associated with
   // |web_contents| is closed.
   virtual void OnDialogClosed(content::WebContents* web_contents) = 0;
 
   // Sets the name of the extensions associated with the
   // |web_contents| in the |name_out| if there is one, returning true;
   // returns false otherwise.
   virtual bool GetExtensionName(content::WebContents* web_contents,
                                 const GURL& origin_url,
                                 std::string* name_out) = 0;
 };
 
+}  // namespace app_modal_dialogs
+
 #endif  // COMPONENTS_APP_MODAL_DIALOGS_JAVASCRIPT_DIALOG_EXTENSIONS_CLIENT_H_