Remove parts of //cc we aren't using

cc/layers/picture_image_layer_impl.h

-// Copyright 2013 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_PICTURE_IMAGE_LAYER_IMPL_H_
-#define CC_LAYERS_PICTURE_IMAGE_LAYER_IMPL_H_
-
-#include "cc/layers/picture_layer_impl.h"
-
-namespace cc {
-
-class CC_EXPORT PictureImageLayerImpl : public PictureLayerImpl {
- public:
-  static scoped_ptr<PictureImageLayerImpl> Create(LayerTreeImpl* tree_impl,
-                                                  int id,
-                                                  bool is_mask) {
-    return make_scoped_ptr(new PictureImageLayerImpl(tree_impl, id, is_mask));
-  }
-  ~PictureImageLayerImpl() override;
-
-  // LayerImpl overrides.
-  const char* LayerTypeAsString() const override;
-  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
-
- protected:
-  PictureImageLayerImpl(LayerTreeImpl* tree_impl, int id, bool is_mask);
-
-  bool ShouldAdjustRasterScale() const override;
-  void RecalculateRasterScales() override;
-  void GetDebugBorderProperties(SkColor* color, float* width) const override;
-
-  void UpdateIdealScales() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PictureImageLayerImpl);
-};
-
-}  // namespace cc
-
-#endif  // CC_LAYERS_PICTURE_IMAGE_LAYER_IMPL_H_