Update matrix distance metric to account for snapping.

ui/gfx/transform_util_unittest.cc

 // Copyright (c) 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 "ui/gfx/transform_util.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/point3_f.h"
 #include "ui/gfx/geometry/rect.h"
@@ skipping 174 matching lines @@
 
   point = Point(0, 0);
   transform.TransformPoint(&point);
   EXPECT_EQ(Point(-14, -24).ToString(), point.ToString());
 
   point = Point(1, 1);
   transform.TransformPoint(&point);
   EXPECT_EQ(Point(-11, -20).ToString(), point.ToString());
 }
 
-TEST(TransformUtilTest, MatrixDistance) {
-  Transform a;
-  Transform b(0, 1, 1, 1,
-              1, 0, 1, 1,
-              1, 1, 0, 1,
-              1, 1, 1, 0);
-  // Each entry in |a| should be 1 away from the corresponding entry in |b|.
-  // This means the matrix distance should be sqrt(num_entries) = 4.
-  EXPECT_EQ(4, MatrixDistance(a, b));
-
-  Transform c = b;
-  EXPECT_EQ(0, MatrixDistance(b, c));
-}
-
 }  // namespace
 }  // namespace gfx