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

cc/math_util.cc

Index: cc/math_util.cc
diff --git a/cc/math_util.cc b/cc/math_util.cc
index 46d1c278253a72a1d62bc9311a13952180768cf1..8ccd5b5a58151b16c5bcdf15d6532eabcfd4ec83 100644
--- a/cc/math_util.cc
+++ b/cc/math_util.cc
@@ -422,18 +422,6 @@ void MathUtil::rotateEulerAngles(gfx::Transform* transform, double eulerX, doubl
     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;