cc: Rename TileTaskClient interface to RasterBufferProvider.

cc/tiles/gpu_image_decode_controller.cc

Index: cc/tiles/gpu_image_decode_controller.cc
diff --git a/cc/tiles/gpu_image_decode_controller.cc b/cc/tiles/gpu_image_decode_controller.cc
index 91f0a33ed78f15ca110375ecea76d8f8a308d6ae..ab683d69abc698c0a9435187e0c3e707ed953f31 100644
--- a/cc/tiles/gpu_image_decode_controller.cc
+++ b/cc/tiles/gpu_image_decode_controller.cc
@@ -77,8 +77,8 @@ class ImageDecodeTaskImpl : public ImageDecodeTask {
   }
 
   // Overridden from TileTask:
-  void ScheduleOnOriginThread(TileTaskClient* client) override {}
-  void CompleteOnOriginThread(TileTaskClient* client) override {
+  void ScheduleOnOriginThread(RasterBufferProvider* provider) override {}
+  void CompleteOnOriginThread(RasterBufferProvider* provider) override {
     controller_->DecodeTaskCompleted(image_);
   }
 
@@ -118,8 +118,8 @@ class ImageUploadTaskImpl : public ImageDecodeTask {
     controller_->UploadImage(image_);
   }
 
-  void ScheduleOnOriginThread(TileTaskClient* client) override {}
-  void CompleteOnOriginThread(TileTaskClient* client) override {
+  void ScheduleOnOriginThread(RasterBufferProvider* provider) override {}
+  void CompleteOnOriginThread(RasterBufferProvider* provider) override {
     controller_->UploadTaskCompleted(image_);
   }