Snap widgets to pixel boundary on ash

ash/wm/lock_layout_manager.h

 // Copyright 2014 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_LOCK_LAYOUT_MANAGER_H_
 #define ASH_WM_LOCK_LAYOUT_MANAGER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shell_delegate.h"
+#include "ash/snap_to_pixel_layout_manager.h"
 #include "ash/wm/wm_types.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/window_observer.h"
 #include "ui/gfx/rect.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 
@@ skipping 17 matching lines @@
 // cases. LockScreenContainer does not use default work area definition.
 // By default work area is defined as display area minus shelf, docked windows
 // and minus virtual keyboard bounds.
 // For windows in LockScreenContainer work area is display area minus virtual
 // keyboard bounds (only if keyboard overscroll is disabled). If keyboard
 // overscroll is enabled then work area always equals to display area size since
 // virtual keyboard changes inner workspace of each WebContents.
 // For all windows in LockScreenContainer default wm::WindowState is replaced
 // with LockWindowState.
 class ASH_EXPORT LockLayoutManager
-    : public aura::LayoutManager,
+    : public SnapToPixelLayoutManager,
       public aura::WindowObserver,
       public VirtualKeyboardStateObserver,
       public keyboard::KeyboardControllerObserver {
  public:
   explicit LockLayoutManager(aura::Window* window);
   virtual ~LockLayoutManager();
 
   // Overridden from aura::LayoutManager:
   virtual void OnWindowResized() OVERRIDE;
   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
@@ skipping 35 matching lines @@
 
   // The bounds of the keyboard.
   gfx::Rect keyboard_bounds_;
 
   DISALLOW_COPY_AND_ASSIGN(LockLayoutManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_LOCK_LAYOUT_MANAGER_H_