Re-land: cc: Cleanup internal::WorkerPoolTaskClient interface.

cc/resources/image_raster_worker_pool.h

Index: cc/resources/image_raster_worker_pool.h
diff --git a/cc/resources/image_raster_worker_pool.h b/cc/resources/image_raster_worker_pool.h
index a4f55c5699f62f45214446c776dfd608e52bf6e2..f28e74c57393bc91c57e89c7963eb78cf5be1c85 100644
--- a/cc/resources/image_raster_worker_pool.h
+++ b/cc/resources/image_raster_worker_pool.h
@@ -24,13 +24,10 @@ class CC_EXPORT ImageRasterWorkerPool : public RasterWorkerPool {
   virtual void CheckForCompletedTasks() OVERRIDE;
 
   // Overridden from internal::WorkerPoolTaskClient:
-  virtual SkCanvas* AcquireCanvasForRaster(internal::RasterWorkerPoolTask* task)
-      OVERRIDE;
-  virtual void OnRasterCompleted(internal::RasterWorkerPoolTask* task,
-                                 const PicturePileImpl::Analysis& analysis)
-      OVERRIDE;
-  virtual void OnImageDecodeCompleted(internal::WorkerPoolTask* task) OVERRIDE {
-  }
+  virtual SkCanvas* AcquireCanvasForRaster(internal::WorkerPoolTask* task,
+                                           const Resource* resource) OVERRIDE;
+  virtual void ReleaseCanvasForRaster(internal::WorkerPoolTask* task,
+                                      const Resource* resource) OVERRIDE;
 
  protected:
   ImageRasterWorkerPool(internal::TaskGraphRunner* task_graph_runner,