Revert of Move NumberOfPlanesForGpuMemoryBufferFormat to gfx

ui/gfx/buffer_format_util.cc

Index: ui/gfx/buffer_format_util.cc
diff --git a/ui/gfx/buffer_format_util.cc b/ui/gfx/buffer_format_util.cc
deleted file mode 100644
index 61cf26066719d095e131c66e44ba9a3c72ef9dc6..0000000000000000000000000000000000000000
--- a/ui/gfx/buffer_format_util.cc
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2015 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 "ui/gfx/buffer_format_util.h"
-
-#include "base/logging.h"
-
-namespace gfx {
-
-size_t NumberOfPlanesForBufferFormat(BufferFormat format) {
-  switch (format) {
-    case BufferFormat::ATC:
-    case BufferFormat::ATCIA:
-    case BufferFormat::DXT1:
-    case BufferFormat::DXT5:
-    case BufferFormat::ETC1:
-    case BufferFormat::R_8:
-    case BufferFormat::RGBA_4444:
-    case BufferFormat::RGBA_8888:
-    case BufferFormat::RGBX_8888:
-    case BufferFormat::BGRA_8888:
-      return 1;
-    case BufferFormat::YUV_420:
-      return 3;
-  }
-  NOTREACHED();
-  return 0;
-}
-
-}  // namespace gfx