athena: Remove ActivityViewModel::CreateWidget().

athena/test/base/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_BASE_SAMPLE_ACTIVITY_H_
 #define ATHENA_TEST_BASE_SAMPLE_ACTIVITY_H_
 
 #include "athena/activity/public/activity.h"
 #include "athena/activity/public/activity_view_model.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 24 matching lines @@
   aura::Window* GetWindow() override;
   content::WebContents* GetWebContents() override;
 
   // athena::ActivityViewModel:
   void Init() override;
   SkColor GetRepresentativeColor() const override;
   base::string16 GetTitle() const override;
   gfx::ImageSkia GetIcon() const override;
   bool UsesFrame() const override;
   views::View* GetContentsView() override;
-  views::Widget* CreateWidget() override;
   gfx::ImageSkia GetOverviewModeImage() override;
   void PrepareContentsForOverview() override;
   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_;
 
   // This is to emulate real implementation.
   scoped_ptr<AcceleratorManager> accelerator_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(SampleActivity);
 };
 
 }  // namespace test
 }  // namespace athena
 
 #endif  // ATHENA_TEST_BASE_SAMPLE_ACTIVITY_H_