ui: Make gfx::Point::Scale() mutate the class, similar to gfx::Rect.

ui/gfx/quad_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/quad_f.h"
 
 #include "base/basictypes.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/rect_f.h"
 
@@ skipping 327 matching lines @@
 }
 
 TEST(QuadTest, Scale) {
   PointF a(1.3f, 1.4f);
   PointF b(-0.8f, 4.4f);
   PointF c(1.8f, 6.1f);
   PointF d(2.1f, 1.6f);
   QuadF q1(a, b, c, d);
   q1.Scale(1.5f);
 
-  PointF a_scaled = a.Scale(1.5f);
-  PointF b_scaled = b.Scale(1.5f);
-  PointF c_scaled = c.Scale(1.5f);
-  PointF d_scaled = d.Scale(1.5f);
+  PointF a_scaled = ScalePoint(a, 1.5f);
+  PointF b_scaled = ScalePoint(b, 1.5f);
+  PointF c_scaled = ScalePoint(c, 1.5f);
+  PointF d_scaled = ScalePoint(d, 1.5f);
   EXPECT_EQ(q1.ToString(),
             QuadF(a_scaled, b_scaled, c_scaled, d_scaled).ToString());
 
   QuadF q2;
   q2.Scale(1.5f);
   EXPECT_EQ(q2.ToString(), q2.ToString());
 }
 
 }  // namespace gfx