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

cc/raster/gpu_tile_task_worker_pool.h

Index: cc/raster/gpu_tile_task_worker_pool.h
diff --git a/cc/raster/gpu_tile_task_worker_pool.h b/cc/raster/gpu_tile_task_worker_pool.h
index 0577b51fdfb70e1ac620bbe491a049f2a4d4ba59..6943a271c0ef1d50fc7aba9d21d3260a7b7eabcd 100644
--- a/cc/raster/gpu_tile_task_worker_pool.h
+++ b/cc/raster/gpu_tile_task_worker_pool.h
@@ -22,7 +22,7 @@ class CC_EXPORT GpuTileTaskWorkerPool : public TileTaskWorkerPool,
  public:
   ~GpuTileTaskWorkerPool() override;
 
-  static scoped_ptr<TileTaskWorkerPool> Create(
+  static std::unique_ptr<TileTaskWorkerPool> Create(
       base::SequencedTaskRunner* task_runner,
       TaskGraphRunner* task_graph_runner,
       ContextProvider* context_provider,
@@ -41,11 +41,11 @@ class CC_EXPORT GpuTileTaskWorkerPool : 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;
 
  private:
   GpuTileTaskWorkerPool(base::SequencedTaskRunner* task_runner,
@@ -60,7 +60,7 @@ class CC_EXPORT GpuTileTaskWorkerPool : public TileTaskWorkerPool,
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   TaskGraphRunner* task_graph_runner_;
   const NamespaceToken namespace_token_;
-  scoped_ptr<GpuRasterizer> rasterizer_;
+  std::unique_ptr<GpuRasterizer> rasterizer_;
 
   Task::Vector completed_tasks_;