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

cc/test/geometry_test_utils.cc

Index: cc/test/geometry_test_utils.cc
diff --git a/cc/test/geometry_test_utils.cc b/cc/test/geometry_test_utils.cc
index 35cd0dd39feffe153b2ad8379f4848947e509d56..803e46417f32c6e34757786788672fbe8e010a88 100644
--- a/cc/test/geometry_test_utils.cc
+++ b/cc/test/geometry_test_utils.cc
@@ -6,6 +6,7 @@
 
 #include <public/WebTransformationMatrix.h>
 
+#include "base/logging.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/transform.h"
 
@@ -57,4 +58,12 @@ void ExpectTransformationMatrixEq(const gfx::Transform& expected,
     EXPECT_FLOAT_EQ((expected).matrix().getDouble(3, 3), (actual).matrix().getDouble(3, 3));
 }
 
+gfx::Transform inverse(const gfx::Transform& transform)
+{
+    gfx::Transform result;

[danakj, 2012/12/19 05:23:06]

I guess this should be kSkipInitialization as well?

+    bool invertedSuccessfully = transform.GetInverse(&result);
+    DCHECK(invertedSuccessfully);
+    return result;
+}
+
 }  // namespace cc