Revert 171544

cc/test/pixel_test_utils.h

-// Copyright (c) 2012 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 "base/file_path.h"
-
-class SkBitmap;
-
-namespace cc {
-namespace test {
-
-// Encodes a bitmap into a PNG and write to disk. Returns true on success. The
-// parent directory does not have to exist.
-bool WritePNGFile(const SkBitmap& bitmap, const FilePath& file_path);
-
-// Reads and decodes a PNG image to a bitmap. Returns true on success. The PNG
-// should have been encoded using |gfx::PNGCodec::Encode|.
-bool ReadPNGFile(const FilePath& file_path, SkBitmap* bitmap);
-
-// Compares with a PNG file on disk, and returns true if it is the same as
-// the given image. |ref_img_path| is absolute.
-bool IsSameAsPNGFile(const SkBitmap& gen_bmp, FilePath ref_img_path);
-
-}  // namespace test
-}  // namespace cc