Get FileSelect dialog work on athena

athena/test/sample_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_TEST_SAMPLE_ACTIVITY_H_
 #define ATHENA_TEST_SAMPLE_ACTIVITY_H_
 
 #include "athena/activity/public/activity.h"
 #include "athena/activity/public/activity_view_model.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace athena {
 namespace test {
 
 class SampleActivity : public Activity,
                        public ActivityViewModel {
  public:
   SampleActivity(SkColor color,
                  SkColor contents_color,
                  const base::string16& title);
   virtual ~SampleActivity();
 
   // athena::Activity:
   virtual athena::ActivityViewModel* GetActivityViewModel() OVERRIDE;
   virtual void SetCurrentState(Activity::ActivityState state) OVERRIDE;
   virtual ActivityState GetCurrentState() OVERRIDE;
   virtual bool IsVisible() OVERRIDE;
   virtual ActivityMediaState GetMediaState() OVERRIDE;
   virtual aura::Window* GetWindow() OVERRIDE;
+  virtual content::WebContents* GetWebContents() OVERRIDE;
 
   // athena::ActivityViewModel:
   virtual void Init() OVERRIDE;
   virtual SkColor GetRepresentativeColor() const OVERRIDE;
   virtual base::string16 GetTitle() const OVERRIDE;
   virtual gfx::ImageSkia GetIcon() const OVERRIDE;
   virtual bool UsesFrame() const OVERRIDE;
   virtual views::View* GetContentsView() OVERRIDE;
   virtual views::Widget* CreateWidget() OVERRIDE;
   virtual gfx::ImageSkia GetOverviewModeImage() OVERRIDE;
   virtual void PrepareContentsForOverview() OVERRIDE;
   virtual void ResetContentsView() OVERRIDE;
 
  private:
   SkColor color_;
   SkColor contents_color_;
   base::string16 title_;
   views::View* contents_view_;
 
   // The current state for this activity.
   ActivityState current_state_;
 
   DISALLOW_COPY_AND_ASSIGN(SampleActivity);
 };
 
 }  // namespace test
 }  // namespace athena
 
 #endif  // ATHENA_TEST_SAMPLE_ACTIVITY_H_