Adding proper dragging behavior for L/R maximized windows.

ash/wm/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_WINDOW_RESIZER_H_
 #define ASH_WM_WINDOW_RESIZER_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "ui/gfx/rect.h"
@@ skipping 56 matching lines @@
             const gfx::Point& location,
             int window_component);
     ~Details();
 
     // The window we're resizing.
     aura::Window* window;
 
     // Initial bounds of the window.
     gfx::Rect initial_bounds;
 
+    // Restore bounds (in screen coordinates) of the window before the drag
+    // started. Only set if the window is normal and is being dragged.
+    gfx::Rect restore_bounds;
+
     // Location passed to the constructor, in |window->parent()|'s coordinates.
     gfx::Point initial_location_in_parent;
 
     // Initial opacity of the window.
     float initial_opacity;
 
     // The component the user pressed on.
     int window_component;
 
     // Bitmask of the |kBoundsChange_| constants.
@@ skipping 41 matching lines @@
   // Returns the height of the drag.
   static int GetHeightForDrag(const Details& details,
                               int min_height,
                               int* delta_y,
                               int grid_size);
 };
 
 }  // namespace aura
 
 #endif  // ASH_WM_WINDOW_RESIZER_H_