Revert "Delete CC."

cc/base/float_quad_unittest.cc

+// Copyright 2011 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/base/math_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/geometry/quad_f.h"
+#include "ui/gfx/geometry/rect_f.h"
+#include "ui/gfx/transform.h"
+
+namespace cc {
+namespace {
+
+// TODO(danakj) Move this test to ui/gfx/ when we don't need MathUtil::MapQuad.
+TEST(FloatQuadTest, IsRectilinearTest) {
+  const int kNumRectilinear = 8;
+  gfx::Transform rectilinear_trans[kNumRectilinear];
+  rectilinear_trans[1].Rotate(90.f);
+  rectilinear_trans[2].Rotate(180.f);
+  rectilinear_trans[3].Rotate(270.f);
+  rectilinear_trans[4].SkewX(0.00000000001f);
+  rectilinear_trans[5].SkewY(0.00000000001f);
+  rectilinear_trans[6].Scale(0.00001f, 0.00001f);
+  rectilinear_trans[6].Rotate(180.f);
+  rectilinear_trans[7].Scale(100000.f, 100000.f);
+  rectilinear_trans[7].Rotate(180.f);
+
+  gfx::QuadF original(
+      gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f));
+
+  for (int i = 0; i < kNumRectilinear; ++i) {
+    bool clipped = false;
+    gfx::QuadF quad =
+        MathUtil::MapQuad(rectilinear_trans[i], original, &clipped);
+    ASSERT_TRUE(!clipped) << "case " << i;
+    EXPECT_TRUE(quad.IsRectilinear()) << "case " << i;
+  }
+
+  const int kNumNonRectilinear = 10;
+  gfx::Transform non_rectilinear_trans[kNumNonRectilinear];
+  non_rectilinear_trans[0].Rotate(359.9999f);
+  non_rectilinear_trans[1].Rotate(0.0000001f);
+  non_rectilinear_trans[2].Rotate(89.9999f);
+  non_rectilinear_trans[3].Rotate(90.00001f);
+  non_rectilinear_trans[4].Rotate(179.9999f);
+  non_rectilinear_trans[5].Rotate(180.00001f);
+  non_rectilinear_trans[6].Rotate(269.9999f);
+  non_rectilinear_trans[7].Rotate(270.0001f);
+  non_rectilinear_trans[8].SkewX(0.00001f);
+  non_rectilinear_trans[9].SkewY(0.00001f);
+
+  for (int i = 0; i < kNumNonRectilinear; ++i) {
+    bool clipped = false;
+    gfx::QuadF quad =
+        MathUtil::MapQuad(non_rectilinear_trans[i], original, &clipped);
+    ASSERT_TRUE(!clipped) << "case " << i;
+    EXPECT_FALSE(quad.IsRectilinear()) << "case " << i;
+  }
+}
+
+}  // namespace
+}  // namespace cc