Re-land: cc: Use worker context for one-copy tile initialization.

cc/resources/resource_format.h

 // 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.
 
 #ifndef CC_RESOURCES_RESOURCE_FORMAT_H_
 #define CC_RESOURCES_RESOURCE_FORMAT_H_
 
 #include "base/logging.h"
 #include "cc/base/cc_export.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/gfx/gpu_memory_buffer.h"
 
 // TODO(prashant.n): Including third_party/khronos/GLES2/gl2.h causes
 // redefinition errors as macros/functions defined in it conflict with
 // macros/functions defined in ui/gl/gl_bindings.h. (http://crbug.com/512833).
 typedef unsigned int GLenum;
 
 namespace cc {
 
 // Keep in sync with arrays below.
 enum ResourceFormat {
   RGBA_8888,
   RGBA_4444,
   BGRA_8888,
   ALPHA_8,
   LUMINANCE_8,
   RGB_565,
   ETC1,
   RED_8,
   RESOURCE_FORMAT_MAX = RED_8,
 };
 
 SkColorType ResourceFormatToSkColorType(ResourceFormat format);
 
 CC_EXPORT int BitsPerPixel(ResourceFormat format);
 CC_EXPORT GLenum GLDataType(ResourceFormat format);
 CC_EXPORT GLenum GLDataFormat(ResourceFormat format);
 CC_EXPORT GLenum GLInternalFormat(ResourceFormat format);
+CC_EXPORT gfx::GpuMemoryBuffer::Format GpuMemoryBufferFormat(
+    ResourceFormat format);
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_FORMAT_H_