cc: Add mailbox support to ResourceProvider write locks.

cc/raster/zero_copy_raster_buffer_provider.cc

 // Copyright 2013 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.
 
 #include "cc/raster/zero_copy_raster_buffer_provider.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
@@ skipping 37 matching lines @@
     DCHECK_GE(buffer->stride(0), 0);
 
     // TODO(danakj): Implement partial raster with raster_dirty_rect.
     RasterBufferProvider::PlaybackToMemory(
         buffer->memory(0), resource_->format(), resource_->size(),
         buffer->stride(0), raster_source, raster_full_rect, raster_full_rect,
         scale, playback_settings);
     buffer->Unmap();
   }
 
+  void SetSyncToken(const gpu::SyncToken& sync_token) override { NOTREACHED(); }
+
  private:
   ResourceProvider::ScopedWriteLockGpuMemoryBuffer lock_;
   const Resource* resource_;
 
   DISALLOW_COPY_AND_ASSIGN(RasterBufferImpl);
 };
 
 }  // namespace
 
 // static
@@ skipping 43 matching lines @@
 }
 
 bool ZeroCopyRasterBufferProvider::GetResourceRequiresSwizzle(
     bool must_support_alpha) const {
   return ResourceFormatRequiresSwizzle(GetResourceFormat(must_support_alpha));
 }
 
 void ZeroCopyRasterBufferProvider::Shutdown() {}
 
 }  // namespace cc