views: Move layout_manager.[cc,h] into layout directory.

views/layout/box_layout.h

 // Copyright (c) 2011 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 VIEWS_LAYOUT_BOX_LAYOUT_H_
 #define VIEWS_LAYOUT_BOX_LAYOUT_H_
 #pragma once
 
 #include "base/basictypes.h"
-#include "views/layout_manager.h"
+#include "views/layout/layout_manager.h"
 
 namespace views {
 
 // A Layout manager that arranges child views vertically or horizontally in a
 // side-by-side fashion with spacing around and between the child views. The
 // child views are always sized according to their preferred size. If the
 // host's bounds provide insufficient space, child views will be clamped.
 // Excess space will not be distributed.
 class BoxLayout : public LayoutManager {
  public:
@@ skipping 25 matching lines @@
 
   // Spacing to put in between child views.
   const int between_child_spacing_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(BoxLayout);
 };
 
 } // namespace views
 
 #endif // VIEWS_LAYOUT_BOX_LAYOUT_H_