Get FileSelect dialog work on athena

athena/activity/public/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_ACTIVITY_PUBLIC_ACTIVITY_H_
 #define ATHENA_ACTIVITY_PUBLIC_ACTIVITY_H_
 
 #include <string>
 
 #include "athena/athena_export.h"
 
 namespace aura {
 class Window;
 }
 
+namespace content {
+class WebContents;
+}
+
 namespace athena {
 
 class ActivityViewModel;
 
 // This class is a high level abstraction of an activity (which could be either
 // a web page or a V1/V2 app/extension). Through this class the activity can
 // be controlled (e.g. loaded / unloaded).
 // An Activity gets created with state |ACTIVITY_UNLOADED|.
 // Requesting |ACTIVITY_VISIBLE| or |ACTIVITY_INVISIBLE| will load it.
 // Once an activity was |ACTIVITY_INVISIBLE| for a while it can be transitioned
@@ skipping 56 matching lines @@
 
   // Returns the current media state.
   virtual ActivityMediaState GetMediaState() = 0;
 
   // Returns the window for the activity. This can be used to determine the
   // stacking order of this activity against others.
   // TODO(oshima): Consider returning base::Window window instead,
   // which has Show/ShowInactive and other control methods.
   virtual aura::Window* GetWindow() = 0;
 
+  // Returns the web contents used to draw the content of the activity.
+  // This may return NULL if the web content is not available.
+  virtual content::WebContents* GetWebContents() = 0;
+
  protected:
   virtual ~Activity() {}
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_ACTIVITY_PUBLIC_ACTIVITY_H_