cc: Rename TileTaskClient interface to RasterBufferProvider.

cc/raster/tile_task_runner.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RASTER_TILE_TASK_RUNNER_H_
 #define CC_RASTER_TILE_TASK_RUNNER_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/callback.h"
+#include "cc/raster/raster_buffer.h"
 #include "cc/raster/task_graph_runner.h"
 #include "cc/resources/resource_format.h"
 
 namespace cc {
-class ImageDecodeTask;
-class RasterTask;
-class Resource;
-class RasterBuffer;
-
-class CC_EXPORT TileTaskClient {
- public:
-  virtual std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource,
-      uint64_t resource_content_id,
-      uint64_t previous_content_id) = 0;
-  virtual void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) = 0;
-
- protected:
-  virtual ~TileTaskClient() {}
-};
 
 class CC_EXPORT TileTask : public Task {
  public:
   typedef std::vector<scoped_refptr<TileTask>> Vector;
 
-  virtual void ScheduleOnOriginThread(TileTaskClient* client) = 0;
-  virtual void CompleteOnOriginThread(TileTaskClient* client) = 0;
+  virtual void ScheduleOnOriginThread(RasterBufferProvider* provider) = 0;
+  virtual void CompleteOnOriginThread(RasterBufferProvider* provider) = 0;
 
   void WillSchedule();
   void DidSchedule();
   bool HasBeenScheduled() const;
 
   void WillComplete();
   void DidComplete();
   bool HasCompleted() const;
 
  protected:
@@ skipping 59 matching lines @@
 
   // Check for completed tasks and dispatch reply callbacks.
   virtual void CheckForCompletedTasks() = 0;
 
   // Returns the format to use for the tiles.
   virtual ResourceFormat GetResourceFormat(bool must_support_alpha) const = 0;
 
   // Determine if the resource requires swizzling.
   virtual bool GetResourceRequiresSwizzle(bool must_support_alpha) const = 0;
 
+  // Downcasting routine for RasterBufferProvider interface.
+  virtual RasterBufferProvider* AsRasterBufferProvider() = 0;
+
  protected:
   // Check if resource format matches output format.
   static bool ResourceFormatRequiresSwizzle(ResourceFormat format);
 
   virtual ~TileTaskRunner() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_TILE_TASK_RUNNER_H_