Make touch-resizing windows to screen edge possible

ash/wm/workspace/workspace_window_resizer.h

 // Copyright (c) 2012 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_WORKSPACE_WINDOW_RESIZER_H_
 #define ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
 
 #include <vector>
 
 #include "ash/wm/window_resizer.h"
@@ skipping 19 matching lines @@
  public:
   // When dragging an attached window this is the min size we'll make sure is
   // visible. In the vertical direction we take the max of this and that from
   // the delegate.
   static const int kMinOnscreenSize;
 
   // Min height we'll force on screen when dragging the caption.
   // TODO: this should come from a property on the window.
   static const int kMinOnscreenHeight;
 
-  // Snap region when dragging close to the edges. That is, as the window gets
-  // this close to an edge of the screen it snaps to the edge.
+  // Snap region when dragging close to the edges using mouse. That is, as the
+  // window gets this close to an edge of the screen it snaps to the edge.
   static const int kScreenEdgeInset;
 
   virtual ~WorkspaceWindowResizer();
 
   static WorkspaceWindowResizer* Create(
       aura::Window* window,
       const gfx::Point& location_in_parent,
       int window_component,
       const std::vector<aura::Window*>& attached_windows);
 
@@ skipping 156 matching lines @@
   // should attach.
   MatchedEdge magnetism_edge_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceWindowResizer);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_WINDOW_RESIZER_H_