Revert "Delete CC."

cc/test/geometry_test_utils.cc

+// Copyright 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 "cc/test/geometry_test_utils.h"
+
+#include "base/logging.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/transform.h"
+
+namespace cc {
+
+// NOTE: even though transform data types use double precision, we only check
+// for equality within single-precision error bounds because many transforms
+// originate from single-precision data types such as quads/rects/etc.
+
+void ExpectTransformationMatrixEq(const gfx::Transform& expected,
+                                  const gfx::Transform& actual) {
+  EXPECT_FLOAT_EQ((expected).matrix().get(0, 0), (actual).matrix().get(0, 0));
+  EXPECT_FLOAT_EQ((expected).matrix().get(1, 0), (actual).matrix().get(1, 0));
+  EXPECT_FLOAT_EQ((expected).matrix().get(2, 0), (actual).matrix().get(2, 0));
+  EXPECT_FLOAT_EQ((expected).matrix().get(3, 0), (actual).matrix().get(3, 0));
+  EXPECT_FLOAT_EQ((expected).matrix().get(0, 1), (actual).matrix().get(0, 1));
+  EXPECT_FLOAT_EQ((expected).matrix().get(1, 1), (actual).matrix().get(1, 1));
+  EXPECT_FLOAT_EQ((expected).matrix().get(2, 1), (actual).matrix().get(2, 1));
+  EXPECT_FLOAT_EQ((expected).matrix().get(3, 1), (actual).matrix().get(3, 1));
+  EXPECT_FLOAT_EQ((expected).matrix().get(0, 2), (actual).matrix().get(0, 2));
+  EXPECT_FLOAT_EQ((expected).matrix().get(1, 2), (actual).matrix().get(1, 2));
+  EXPECT_FLOAT_EQ((expected).matrix().get(2, 2), (actual).matrix().get(2, 2));
+  EXPECT_FLOAT_EQ((expected).matrix().get(3, 2), (actual).matrix().get(3, 2));
+  EXPECT_FLOAT_EQ((expected).matrix().get(0, 3), (actual).matrix().get(0, 3));
+  EXPECT_FLOAT_EQ((expected).matrix().get(1, 3), (actual).matrix().get(1, 3));
+  EXPECT_FLOAT_EQ((expected).matrix().get(2, 3), (actual).matrix().get(2, 3));
+  EXPECT_FLOAT_EQ((expected).matrix().get(3, 3), (actual).matrix().get(3, 3));
+}
+
+gfx::Transform Inverse(const gfx::Transform& transform) {
+  gfx::Transform result(gfx::Transform::kSkipInitialization);
+  bool inverted_successfully = transform.GetInverse(&result);
+  DCHECK(inverted_successfully);
+  return result;
+}
+
+}  // namespace cc