cc::ResourcePool - Re-use larger resources for smaller requests

cc/raster/one_copy_raster_buffer_provider.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_ONE_COPY_RASTER_BUFFER_PROVIDER_H_
 #define CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 92 matching lines @@
       const gfx::Rect& raster_dirty_rect,
       const gfx::AxisTransform2d& transform,
       const gfx::ColorSpace& dst_color_space,
       const RasterSource::PlaybackSettings& playback_settings,
       uint64_t previous_content_id,
       uint64_t new_content_id);
   void CopyOnWorkerThread(StagingBuffer* staging_buffer,
                           ResourceProvider::ScopedWriteLockGL* resource_lock,
                           const gpu::SyncToken& sync_token,
                           const RasterSource* raster_source,
-                          uint64_t previous_content_id,
-                          uint64_t new_content_id);
+                          const gfx::Rect& rect_to_copy);
   gfx::BufferUsage StagingBufferUsage() const;
 
   ContextProvider* const compositor_context_provider_;
   ContextProvider* const worker_context_provider_;
   ResourceProvider* const resource_provider_;
   const int max_bytes_per_copy_operation_;
   const bool use_partial_raster_;
 
   // Context lock must be acquired when accessing this member.
   int bytes_scheduled_since_last_flush_;
 
   const ResourceFormat preferred_tile_format_;
   StagingBufferPool staging_pool_;
 
   const bool async_worker_context_enabled_;
 
   std::set<RasterBufferImpl*> pending_raster_buffers_;
 
   DISALLOW_COPY_AND_ASSIGN(OneCopyRasterBufferProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_