Revert "Delete CC."

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.
+
+#ifndef CC_TEST_PIXEL_TEST_UTILS_H_
+#define CC_TEST_PIXEL_TEST_UTILS_H_
+
+#include <string>
+
+#include "base/files/file_path.h"
+#include "cc/test/pixel_comparator.h"
+
+class SkBitmap;
+
+namespace cc {
+
+// 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 base::FilePath& file_path,
+    bool discard_transparency);
+
+// 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 base::FilePath& file_path, SkBitmap* bitmap);
+
+std::string GetPNGDataUrl(const SkBitmap& bitmap);
+
+// Compares with a PNG file on disk using the given PixelComparator, and returns
+// true if the comparator returns a match. |ref_img_path| is absolute.
+bool MatchesPNGFile(const SkBitmap& gen_bmp,
+                    base::FilePath ref_img_path,
+                    const PixelComparator& comparator);
+
+}  // namespace cc
+
+#endif  // CC_TEST_PIXEL_TEST_UTILS_H_