Migrate more functions from MathUtil to gfx::Transform

cc/layer_tree_host_impl_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/layer_tree_host_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 1248 matching lines @@
 }
 
 TEST_P(LayerTreeHostImplTest, scrollMissesBackfacingChild)
 {
     gfx::Size surfaceSize(10, 10);
     scoped_ptr<LayerImpl> root = LayerImpl::create(m_hostImpl->activeTree(), 1);
     scoped_ptr<LayerImpl> child = createScrollableLayer(2, surfaceSize);
     m_hostImpl->setViewportSize(surfaceSize, surfaceSize);
 
     gfx::Transform matrix;
-    MathUtil::rotateEulerAngles(&matrix, 180, 0, 0);
+    matrix.RotateAboutXAxis(180);
     child->setTransform(matrix);
     child->setDoubleSided(false);
 
     root->addChild(child.Pass());
     m_hostImpl->activeTree()->SetRootLayer(root.Pass());
     initializeRendererAndDrawFrame();
 
     // Scroll event is ignored because the scrollable layer is not facing the viewer and there is
     // nothing scrollable behind it.
     EXPECT_EQ(m_hostImpl->scrollBegin(gfx::Point(5, 5), InputHandlerClient::Wheel), InputHandlerClient::ScrollIgnored);
@@ skipping 3132 matching lines @@
     gfx::Rect noDamage = gfx::Rect(m_hostImpl->deviceViewportSize());
     drawFrameAndTestDamage(noDamage);
 }
 
 INSTANTIATE_TEST_CASE_P(LayerTreeHostImplTests,
                         LayerTreeHostImplTest,
                         ::testing::Values(false, true));
 
 }  // namespace
 }  // namespace cc