[MediaRouter] Moved the code useful for Android to MediaRouterDialogController

chrome/browser/ui/webui/media_router/media_router_dialog_controller_impl.h

 // Copyright 2015 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_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_IMPL_H_
 #define CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_IMPL_H_
 
 #include "base/macros.h"
 #include "chrome/browser/media/router/media_router_dialog_controller.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 
 namespace media_router {
 
 // A desktop implementation of MediaRouterDialogController.
 // This class is not thread safe and must be called on the UI thread.
-class MediaRouterDialogControllerImpl
-    : public content::WebContentsUserData<MediaRouterDialogControllerImpl>,
-      public MediaRouterDialogController {
+class MediaRouterDialogControllerImpl :
+    public content::WebContentsUserData<MediaRouterDialogControllerImpl>,
+    public MediaRouterDialogController {
  public:
   ~MediaRouterDialogControllerImpl() override;
 
   static MediaRouterDialogControllerImpl* GetOrCreateForWebContents(
       content::WebContents* web_contents);
 
-  // SuperClass:
-  bool ShowMediaRouterDialogForPresentation(
-      scoped_ptr<CreatePresentationSessionRequest> request) override;
-
-  // Shows the media router dialog modal to the initiator WebContents.
-  // Creates the dialog if it did not exist prior to this call.
-  // If the dialog already exists, brings the dialog to the front.
-  // Returns WebContents for the media router dialog.
-  content::WebContents* ShowMediaRouterDialog();
+  // MediaRouterDialogController:
+  bool IsShowingMediaRouterDialog() override;
+  // This will destroy the dialog WebContents.
+  void CloseMediaRouterDialog() override;
 
   // Returns the media router dialog WebContents.
   // Returns nullptr if there is no dialog.
   content::WebContents* GetMediaRouterDialog() const;
 
-  // Closes the media router dialog. This will destroy the dialog WebContents.
-  // It is an error to call this function if there is currently no dialog.
-  void CloseMediaRouterDialog();
 
  private:
   class DialogWebContentsObserver;
-  class InitiatorWebContentsObserver;
   friend class content::WebContentsUserData<MediaRouterDialogControllerImpl>;
 
   // Use MediaRouterDialogControllerImpl::CreateForWebContents() to create an
   // instance.
   explicit MediaRouterDialogControllerImpl(content::WebContents* web_contents);
 
-  // Creates a new media router dialog modal to |initiator_|.
-  void CreateMediaRouterDialog();
-
-  // Resets this dialog controller to an empty state.
-  void Reset();
+  // MediaRouterDialogController:
+  void Reset() override;
+  void CreateMediaRouterDialog() override;
 
   // Invoked when the dialog WebContents has navigated.
   void OnDialogNavigated(const content::LoadCommittedDetails& details);
 
   void PopulateDialog(content::WebContents* media_router_dialog);
 
-  scoped_ptr<InitiatorWebContentsObserver> initiator_observer_;
   scoped_ptr<DialogWebContentsObserver> dialog_observer_;
 
-  content::WebContents* const initiator_;
-
   // True if the controller is waiting for a new media router dialog to be
   // created.
   bool media_router_dialog_pending_;
 
-  // Data for dialogs created under a Presentation API context.
-  // Passed from the caller of ShowMediaRouterDialogForPresentation(), and
-  // passed to the MediaRouterUI when it is initialized.
-  scoped_ptr<CreatePresentationSessionRequest> presentation_request_;
-
-  base::ThreadChecker thread_checker_;
-
   DISALLOW_COPY_AND_ASSIGN(MediaRouterDialogControllerImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_IMPL_H_