Convert //cc from scoped_ptr to std::unique_ptr.

cc/raster/bitmap_tile_task_worker_pool.h

Index: cc/raster/bitmap_tile_task_worker_pool.h
diff --git a/cc/raster/bitmap_tile_task_worker_pool.h b/cc/raster/bitmap_tile_task_worker_pool.h
index 7fea2b2dcfd21a5dbfe0edd6040e1bdb3f5858c8..4f6d99df3858e51ddc924ffdd19228396b37a2cc 100644
--- a/cc/raster/bitmap_tile_task_worker_pool.h
+++ b/cc/raster/bitmap_tile_task_worker_pool.h
@@ -27,7 +27,7 @@ class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
  public:
   ~BitmapTileTaskWorkerPool() override;
 
-  static scoped_ptr<TileTaskWorkerPool> Create(
+  static std::unique_ptr<TileTaskWorkerPool> Create(
       base::SequencedTaskRunner* task_runner,
       TaskGraphRunner* task_graph_runner,
       ResourceProvider* resource_provider);
@@ -43,11 +43,11 @@ class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
   bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
 
   // Overridden from TileTaskClient:
-  scoped_ptr<RasterBuffer> AcquireBufferForRaster(
+  std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource,
       uint64_t resource_content_id,
       uint64_t previous_content_id) override;
-  void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override;
+  void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override;
 
  protected:
   BitmapTileTaskWorkerPool(base::SequencedTaskRunner* task_runner,
@@ -55,7 +55,8 @@ class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
                            ResourceProvider* resource_provider);
 
  private:
-  scoped_ptr<base::trace_event::ConvertableToTraceFormat> StateAsValue() const;
+  std::unique_ptr<base::trace_event::ConvertableToTraceFormat> StateAsValue()
+      const;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   TaskGraphRunner* task_graph_runner_;