cc: Add ScopedWriteLock classes for raster to GpuMemoryBuffer or using Ganesh.

cc/resources/raster_worker_pool.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/resources/raster_worker_pool.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
@@ skipping 178 matching lines @@
       InsertNodeForTask(graph, decode_task, priority, 0u);
 
     graph->edges.push_back(TaskGraph::Edge(decode_task, raster_task));
   }
 
   InsertNodeForTask(graph, raster_task, priority, dependencies);
 }
 
 // static
 void RasterWorkerPool::AcquireBitmapForBuffer(SkBitmap* bitmap,
-                                              uint8_t* buffer,
+                                              void* buffer,
                                               ResourceFormat buffer_format,
                                               const gfx::Size& size,
                                               int stride) {
   switch (buffer_format) {
     case RGBA_4444:
       bitmap->allocN32Pixels(size.width(), size.height());
       break;
     case RGBA_8888:
     case BGRA_8888: {
       SkImageInfo info =
           SkImageInfo::MakeN32Premul(size.width(), size.height());
       if (!stride)
         stride = info.minRowBytes();
       bitmap->installPixels(info, buffer, stride);
       break;
     }
     case ALPHA_8:
     case LUMINANCE_8:
     case RGB_565:
     case ETC1:
       NOTREACHED();
       break;
   }
 }
 
 // static
 void RasterWorkerPool::ReleaseBitmapForBuffer(SkBitmap* bitmap,
-                                              uint8_t* buffer,
+                                              void* buffer,
                                               ResourceFormat buffer_format) {
   SkColorType buffer_color_type = ResourceFormatToSkColorType(buffer_format);
   if (buffer_color_type != bitmap->colorType()) {
     SkImageInfo dst_info = bitmap->info();
     dst_info.fColorType = buffer_color_type;
     // TODO(kaanb): The GL pipeline assumes a 4-byte alignment for the
     // bitmap data. There will be no need to call SkAlign4 once crbug.com/293728
     // is fixed.
     const size_t dst_row_bytes = SkAlign4(dst_info.minRowBytes());
     DCHECK_EQ(0u, dst_row_bytes % 4);
     bool success = bitmap->readPixels(dst_info, buffer, dst_row_bytes, 0, 0);
     DCHECK_EQ(true, success);
   }
   bitmap->reset();
 }
 
 }  // namespace cc