cc: Rename TileTaskClient interface to RasterBufferProvider.

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 4f6d99df3858e51ddc924ffdd19228396b37a2cc..0a492a9b9866574f73e896775e7f3bab2e646a41 100644
--- a/cc/raster/bitmap_tile_task_worker_pool.h
+++ b/cc/raster/bitmap_tile_task_worker_pool.h
@@ -23,7 +23,7 @@ class ResourceProvider;
 
 class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
                                            public TileTaskRunner,
-                                           public TileTaskClient {
+                                           public RasterBufferProvider {
  public:
   ~BitmapTileTaskWorkerPool() override;
 
@@ -41,8 +41,9 @@ class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
   void CheckForCompletedTasks() override;
   ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
   bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
+  RasterBufferProvider* AsRasterBufferProvider() override;
 
-  // Overridden from TileTaskClient:
+  // Overridden from RasterBufferProvider:
   std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource,
       uint64_t resource_content_id,