Revert of cc: Use worker context for one-copy tile initialization.

cc/resources/resource_format.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/resource_format.h"
 
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
 
 namespace cc {
@@ skipping 69 matching lines @@
   static_assert(arraysize(format_gl_data_format) == (RESOURCE_FORMAT_MAX + 1),
                 "format_gl_data_format does not handle all cases.");
 
   return format_gl_data_format[format];
 }
 
 GLenum GLInternalFormat(ResourceFormat format) {
   return GLDataFormat(format);
 }
 
-gfx::BufferFormat BufferFormat(ResourceFormat format) {
-  switch (format) {
-    case RGBA_8888:
-      return gfx::BufferFormat::RGBA_8888;
-    case BGRA_8888:
-      return gfx::BufferFormat::BGRA_8888;
-    case RGBA_4444:
-      return gfx::BufferFormat::RGBA_4444;
-    case ALPHA_8:
-    case LUMINANCE_8:
-    case RGB_565:
-    case ETC1:
-    case RED_8:
-      break;
-  }
-  NOTREACHED();
-  return gfx::BufferFormat::RGBA_8888;
-}
-
 }  // namespace cc