cc: Rename TileTaskClient interface to RasterBufferProvider.

cc/raster/one_copy_tile_task_worker_pool.cc

Index: cc/raster/one_copy_tile_task_worker_pool.cc
diff --git a/cc/raster/one_copy_tile_task_worker_pool.cc b/cc/raster/one_copy_tile_task_worker_pool.cc
index 47e4c01c5a6ddb37f1513c1311f4cb402d7e97ac..1c14fb944e496d1198cf20427f5d9daed889e964 100644
--- a/cc/raster/one_copy_tile_task_worker_pool.cc
+++ b/cc/raster/one_copy_tile_task_worker_pool.cc
@@ -12,7 +12,6 @@
 
 #include "base/macros.h"
 #include "cc/base/math_util.h"
-#include "cc/raster/raster_buffer.h"
 #include "cc/raster/staging_buffer_pool.h"
 #include "cc/resources/platform_color.h"
 #include "cc/resources/resource_format.h"
@@ -172,6 +171,10 @@ bool OneCopyTileTaskWorkerPool::GetResourceRequiresSwizzle(
   return ResourceFormatRequiresSwizzle(GetResourceFormat(must_support_alpha));
 }
 
+RasterBufferProvider* OneCopyTileTaskWorkerPool::AsRasterBufferProvider() {
+  return this;
+}
+
 std::unique_ptr<RasterBuffer> OneCopyTileTaskWorkerPool::AcquireBufferForRaster(
     const Resource* resource,
     uint64_t resource_content_id,