Migrate more functions from MathUtil to gfx::Transform

cc/damage_tracker_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/damage_tracker.h"
 
 #include "cc/layer_impl.h"
 #include "cc/layer_tree_host_common.h"
 #include "cc/math_util.h"
 #include "cc/single_thread_proxy.h"
@@ skipping 323 matching lines @@
     // Instead, the correctly transformed rect should actually be very huge (i.e. in theory, -infinity on the left),
     // and positioned so that the right-most bound rect will be approximately 501 units in root surface space.
     //
 
     scoped_ptr<LayerImpl> root = createAndSetUpTestTreeWithOneSurface();
     LayerImpl* child = root->children()[0];
 
     gfx::Transform transform;
     transform.Translate3d(500, 500, 0);
     transform.ApplyPerspectiveDepth(1);
-    MathUtil::rotateEulerAngles(&transform, 0, 45, 0);
+    transform.RotateAboutYAxis(45);
     transform.Translate3d(-50, -50, 0);
 
     // Set up the child
     child->setPosition(gfx::PointF(0, 0));
     child->setBounds(gfx::Size(100, 100));
     child->setContentBounds(gfx::Size(100, 100));
     child->setTransform(transform);
     emulateDrawingOneFrame(root.get());
 
     // Sanity check that the child layer's bounds would actually get clipped by w < 0,
@@ skipping 807 matching lines @@
     EXPECT_TRUE(rootDamageRect.IsEmpty());
 
     // Damage should remain empty even after one frame, since there's yet no new damage
     emulateDrawingOneFrame(root.get());
     rootDamageRect = root->renderSurface()->damageTracker()->currentDamageRect();
     EXPECT_TRUE(rootDamageRect.IsEmpty());
 }
 
 }  // namespace
 }  // namespace cc