Remove parts of //cc we aren't using

cc/layers/nine_patch_layer.h

Index: cc/layers/nine_patch_layer.h
diff --git a/cc/layers/nine_patch_layer.h b/cc/layers/nine_patch_layer.h
deleted file mode 100644
index 9054610b8eedc77e18754e37ef527ceb6de96f7c..0000000000000000000000000000000000000000
--- a/cc/layers/nine_patch_layer.h
+++ /dev/null
@@ -1,59 +0,0 @@
-// 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_LAYERS_NINE_PATCH_LAYER_H_
-#define CC_LAYERS_NINE_PATCH_LAYER_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "cc/layers/layer.h"
-#include "cc/layers/ui_resource_layer.h"
-#include "cc/resources/ui_resource_client.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace cc {
-
-class LayerTreeHost;
-class ScopedUIResource;
-
-class CC_EXPORT NinePatchLayer : public UIResourceLayer {
- public:
-  static scoped_refptr<NinePatchLayer> Create();
-
-  void PushPropertiesTo(LayerImpl* layer) override;
-
-  // |border| is the space around the center rectangular region in layer space
-  // (known as aperture in image space).  |border.x()| and |border.y()| are the
-  // size of the left and top boundary, respectively.
-  // |border.width()-border.x()| and |border.height()-border.y()| are the size
-  // of the right and bottom boundary, respectively.
-  void SetBorder(const gfx::Rect& border);
-
-  // aperture is in the pixel space of the bitmap resource and refers to
-  // the center patch of the ninepatch (which is unused in this
-  // implementation). We split off eight rects surrounding it and stick them
-  // on the edges of the layer. The corners are unscaled, the top and bottom
-  // rects are x-stretched to fit, and the left and right rects are
-  // y-stretched to fit.
-  void SetAperture(const gfx::Rect& aperture);
-  void SetFillCenter(bool fill_center);
-
- private:
-  NinePatchLayer();
-  ~NinePatchLayer() override;
-  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
-
-  gfx::Rect border_;
-  bool fill_center_;
-
-  // The transparent center region that shows the parent layer's contents in
-  // image space.
-  gfx::Rect image_aperture_;
-
-  DISALLOW_COPY_AND_ASSIGN(NinePatchLayer);
-};
-
-}  // namespace cc
-
-#endif  // CC_LAYERS_NINE_PATCH_LAYER_H_