V2 app support step2 : Use NativeAppWindow for Activity's window.

athena/content/app_activity.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 ATHENA_CONTENT_APP_ACTIVITY_H_
 #define ATHENA_CONTENT_APP_ACTIVITY_H_
 
 #include "athena/activity/public/activity.h"
 #include "athena/activity/public/activity_view_model.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "ui/gfx/image/image_skia.h"
 
-namespace contents {
-class WebContents;
-}
-
 namespace views {
 class WebView;
 }
 
 namespace athena {
 
 class AppActivityRegistry;
 
 // The activity object for a hosted V2 application.
 class AppActivity : public Activity,
@@ skipping 23 matching lines @@
 
  protected:
   virtual ~AppActivity();
 
  // content::WebContentsObserver:
   virtual void TitleWasSet(content::NavigationEntry* entry,
                            bool explicit_set) OVERRIDE;
   virtual void DidUpdateFaviconURL(
       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
 
-  virtual content::WebContents* GetWebContents() = 0;
+  virtual views::WebView* GetWebView() = 0;
 
  private:
   // Register this activity with its application.
   void RegisterActivity();
 
   // Make the content visible. This call should only be paired with
   // MakeInvisible. Note: Upon start the content is visible.
   // TODO(skuhne): If this can be combined with web_activity, move this into a
   // separate class.
   void MakeVisible();
@@ skipping 18 matching lines @@
   // This object is owned by |AppRegistry| and will be a valid pointer as long
   // as this object lives.
   AppActivityRegistry* app_activity_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(AppActivity);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_CONTENT_APP_ACTIVITY_H_