Remove parts of //cc we aren't using

cc/layers/picture_layer.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_LAYERS_PICTURE_LAYER_H_
-#define CC_LAYERS_PICTURE_LAYER_H_
-
-#include "cc/base/invalidation_region.h"
-#include "cc/debug/devtools_instrumentation.h"
-#include "cc/debug/micro_benchmark_controller.h"
-#include "cc/layers/layer.h"
-#include "cc/trees/occlusion_tracker.h"
-
-namespace cc {
-
-class ContentLayerClient;
-class RecordingSource;
-class ResourceUpdateQueue;
-
-class CC_EXPORT PictureLayer : public Layer {
- public:
-  static scoped_refptr<PictureLayer> Create(ContentLayerClient* client);
-
-  void ClearClient();
-
-  void SetNearestNeighbor(bool nearest_neighbor);
-
-  // Layer interface.
-  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
-  void SetLayerTreeHost(LayerTreeHost* host) override;
-  void PushPropertiesTo(LayerImpl* layer) override;
-  void SetNeedsDisplayRect(const gfx::Rect& layer_rect) override;
-  bool Update(ResourceUpdateQueue* queue,
-              const OcclusionTracker<Layer>* occlusion) override;
-  void SetIsMask(bool is_mask) override;
-  skia::RefPtr<SkPicture> GetPicture() const override;
-  bool IsSuitableForGpuRasterization() const override;
-
-  void RunMicroBenchmark(MicroBenchmark* benchmark) override;
-
-  ContentLayerClient* client() { return client_; }
-
-  RecordingSource* GetRecordingSourceForTesting() {
-    return recording_source_.get();
-  }
-
- protected:
-  explicit PictureLayer(ContentLayerClient* client);
-  // Allow tests to inject a recording source.
-  PictureLayer(ContentLayerClient* client, scoped_ptr<RecordingSource> source);
-  ~PictureLayer() override;
-
-  bool HasDrawableContent() const override;
-
-  bool is_mask() const { return is_mask_; }
-
- private:
-  ContentLayerClient* client_;
-  scoped_ptr<RecordingSource> recording_source_;
-  devtools_instrumentation::
-      ScopedLayerObjectTracker instrumentation_object_tracker_;
-  // Invalidation to use the next time update is called.
-  InvalidationRegion pending_invalidation_;
-  // Invalidation from the last time update was called.
-  Region recording_invalidation_;
-  gfx::Rect last_updated_visible_content_rect_;
-
-  int update_source_frame_number_;
-  bool is_mask_;
-  bool nearest_neighbor_;
-
-  DISALLOW_COPY_AND_ASSIGN(PictureLayer);
-};
-
-}  // namespace cc
-
-#endif  // CC_LAYERS_PICTURE_LAYER_H_