Add ctrl+drag feature for allowing resizing window with exact positioning.

ash/wm/workspace/multi_window_resize_controller.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_MULTI_WINDOW_RESIZE_CONTROLLER_H_
 #define ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 108 matching lines @@
   // Shows the widget immediately.
   void ShowNow();
 
   // Returns true if the widget is showing.
   bool IsShowing() const;
 
   // Initiates a resize.
   void StartResize(const gfx::Point& screen_location);
 
   // Resizes to the new location.
-  void Resize(const gfx::Point& screen_location);
+  void Resize(const gfx::Point& screen_location, int event_flags);
 
   // Completes the resize.
-  void CompleteResize();
+  void CompleteResize(int event_flags);
 
   // Cancels the resize.
   void CancelResize();
 
   // Returns the bounds for the resize widget.
   gfx::Rect CalculateResizeWidgetBounds(const gfx::Point& location) const;
 
   // Returns true if |screen_location| is over the resize windows (or the resize
   // widget itself).
   bool IsOverWindows(const gfx::Point& screen_location) const;
@@ skipping 31 matching lines @@
   // to Show().
   scoped_ptr<views::MouseWatcher> mouse_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiWindowResizeController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_