Move hash_pair.h from cc/base into base/.

cc/resources/picture_layer_tiling.h

 // Copyright 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 CC_RESOURCES_PICTURE_LAYER_TILING_H_
 #define CC_RESOURCES_PICTURE_LAYER_TILING_H_
 
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
-#include "cc/base/hash_pair.h"
 #include "cc/base/region.h"
 #include "cc/base/tiling_data.h"
 #include "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 class PictureLayerTiling;
 
@@ skipping 162 matching lines @@
 
   friend class CoverageIterator;
 
  private:
   DISALLOW_ASSIGN(PictureLayerTiling);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_LAYER_TILING_H_