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

cc/resources/resource_format.h

Index: cc/resources/resource_format.h
diff --git a/cc/resources/resource_format.h b/cc/resources/resource_format.h
index d910bb091e7e62e68282d2d5ba289ed218364f77..ab03cdb7de65a480d1c3002fc3e33af3c5f4822b 100644
--- a/cc/resources/resource_format.h
+++ b/cc/resources/resource_format.h
@@ -8,6 +8,7 @@
 #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
@@ -35,6 +36,8 @@ 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