cc: Do bitmap conversion for RasterBuffer in the worker thread.

cc/resources/raster_buffer.cc

Index: cc/resources/raster_buffer.cc
diff --git a/media/base/browser_cdm.cc b/cc/resources/raster_buffer.cc
similarity index 55%
copy from media/base/browser_cdm.cc
copy to cc/resources/raster_buffer.cc
index 2c44e1652ad09cf59125a471c051a86609347325..8f5671720e386ef03d7bea099ab3ce6164dcacd8 100644
--- a/media/base/browser_cdm.cc
+++ b/cc/resources/raster_buffer.cc
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/base/browser_cdm.h"
+#include "cc/resources/raster_buffer.h"
 
-namespace media {
+namespace cc {
 
-BrowserCdm::BrowserCdm() {
+RasterBuffer::RasterBuffer() {
 }
 
-BrowserCdm::~BrowserCdm() {
+RasterBuffer::~RasterBuffer() {
 }
 
-}  // namespace media
+}  // namespace cc