Implemented swipe to close in overview mode.

ash/wm/overview/window_selector_item.h

Index: ash/wm/overview/window_selector_item.h
diff --git a/ash/wm/overview/window_selector_item.h b/ash/wm/overview/window_selector_item.h
index 6769a7d978f020a0db743c2f7e28ad43a9998fbe..947a7fbced3b22a85fa546a09cf0af5f957b0aa7 100644
--- a/ash/wm/overview/window_selector_item.h
+++ b/ash/wm/overview/window_selector_item.h
@@ -99,7 +99,10 @@ class WindowSelectorItem : public views::ButtonListener,
   virtual void OnWindowTransformed(aura::Window* window) override;
 
   // ash::TransparentActivateWindowButtonDelegate:
+  virtual void Scroll(int delta_x) override;
+  virtual void CancelScroll() override;
   virtual void Select() override;
+  virtual void Close() override;

[jonross, 2014/11/12 23:57:03]

nit: remove virtual from all of the overrides.

[bruthig, 2015/01/02 16:49:17]

Done.

 
  protected:
   // Sets the bounds of this selector's items to |target_bounds| in
@@ -138,11 +141,11 @@ class WindowSelectorItem : public views::ButtonListener,
       return transform_window_.get();
     }
 
-    // Closes the window managed by |this|.
-    void Close();
-
     // ash::TransparentActivateWindowButtonDelegate:
+    virtual void Scroll(int delta_x) override;
+    virtual void CancelScroll() override;
     virtual void Select() override;
+    virtual void Close() override;
 
    private:
     // The transparent overlay that captures events.
@@ -163,6 +166,10 @@ class WindowSelectorItem : public views::ButtonListener,
   // Initializes window_label_.
   void CreateWindowLabel(const base::string16& title);
 
+  // Set the minimum distance, in pixels, for which a scroll gesture will cause
+  // a window to be closed when the scroll distance exceeds |distance|.
+  void SetCloseWindowDistanceMinimum(int distance);
+
   // Updates the selector button overlay's bounds and accessibility names.
   void UpdateSelectorButtons();