Migrate from MathUtil::inverse() to gfx::Transform::GetInverse()

cc/math_util.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/math_util.h"
 
 #include <cmath>
 #include <limits>
 
 #include "ui/gfx/quad_f.h"
@@ skipping 404 matching lines @@
     gfx::Transform rotationAboutZ;
 
     rotationAboutX.RotateAboutXAxis(eulerX);
     rotationAboutY.RotateAboutYAxis(eulerY);
     rotationAboutZ.RotateAboutZAxis(eulerZ);
 
     gfx::Transform composite = rotationAboutZ * rotationAboutY * rotationAboutX;
     transform->PreconcatTransform(composite);
 }
 
-gfx::Transform MathUtil::inverse(const gfx::Transform& transform)
-{
-    gfx::Transform result;
-    bool invertedSuccessfully = transform.GetInverse(&result);
-
-    if (invertedSuccessfully)
-        return result;
-
-    // If transform was un-invertible, then just return identity.
-    return gfx::Transform();
-}
-
 gfx::Transform MathUtil::to2dTransform(const gfx::Transform& transform)
 {
     gfx::Transform result = transform;
     SkMatrix44& matrix = result.matrix();
     matrix.setDouble(0, 2, 0);
     matrix.setDouble(1, 2, 0);
     matrix.setDouble(2, 2, 1);
     matrix.setDouble(3, 2, 0);
 
     matrix.setDouble(2, 0, 0);
@@ skipping 47 matching lines @@
     matrix.setDouble(1, 0, b);
     matrix.setDouble(0, 1, c);
     matrix.setDouble(1, 1, d);
     matrix.setDouble(0, 3, e);
     matrix.setDouble(1, 3, f);
 
     return result;
 }
 
 }  // namespace cc