Implemented swipe to close in overview mode.

ash/wm/overview/scoped_transform_overview_window.h

 // Copyright 2013 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 ASH_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_
 #define ASH_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_
 
 #include "ash/wm/overview/scoped_overview_animation_settings.h"
 #include "ash/wm/overview/transparent_activate_window_button.h"
 #include "ash/wm/overview/transparent_activate_window_button_delegate.h"
@@ skipping 45 matching lines @@
   gfx::Transform get_overview_transform() const { return overview_transform_; }
 
   void set_overview_transform(const gfx::Transform& transform) {
     overview_transform_ = transform;
   }
 
   TransparentActivateWindowButton* activate_button() {
     return activate_button_.get();
   }
 
-
   // Starts an animation sequence which will use animation settings specified by
   // |animation_type|. The |animation_settings| container is populated with
   // scoped entities and the container should be destroyed at the end of the
   // animation sequence.
   //
   // Example:
   //  ScopedTransformOverviewWindow overview_window(window);
   //  ScopedTransformOverviewWindow::ScopedAnimationSettings scoped_settings;
   //  overview_window.BeginScopedAnimation(
   //      OverviewAnimationType::OVERVIEW_ANIMATION_SELECTOR_ITEM_SCROLL_CANCEL,
@@ skipping 30 matching lines @@
   // Applies the |transform| to the overview window and all of its transient
   // children.
   void SetTransform(aura::Window* root_window,
                     const gfx::Transform& transform);
 
   // Set's the opacity of the managed windows.
   void SetOpacity(float opacity);
 
   aura::Window* window() const { return window_; }
 
-  // Closes the transient root of the window managed by |this|.
-  void Close();
-
   // ash::TransparentActivateWindowButtonDelegate:
+  void Scroll(int delta_x) override;
+  void CancelScroll() override;
+  void Close() override;
   void Select() override;
 
  private:
   // A weak pointer to the real window in the overview.
   aura::Window* window_;
 
   // The transparent overlay that captures events.
   scoped_ptr<TransparentActivateWindowButton> activate_button_;
 
   // If true, the window was minimized and should be restored if the window
@@ skipping 15 matching lines @@
 
   // The original opacity of the window before entering overview mode.
   float original_opacity_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedTransformOverviewWindow);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_SCOPED_TRANSFORM_OVERVIEW_WINDOW_H_