ui: Prefer +/- operators to apply offsets.

cc/geometry.h

 // Copyright 2010 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.
 
 #ifndef CC_GEOMETRY_H_
 #define CC_GEOMETRY_H_
 
 #include "ui/gfx/rect.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/vector2d.h"
@@ skipping 47 matching lines @@
 }
 
 inline gfx::Point BottomRight(gfx::Rect rect) {
   return gfx::Point(rect.right(), rect.bottom());
 }
 
 inline gfx::PointF BottomRight(gfx::RectF rect) {
   return gfx::PointF(rect.right(), rect.bottom());
 }
 
-// Return a vector that is |v| scaled by the given scale factors along each
-// axis.
-inline gfx::Vector2dF ScaleVector2d(gfx::Vector2dF v, float x_scale, float y_scale) {
-  gfx::Vector2dF scaled = v;
-  scaled.Scale(x_scale, y_scale);
-  return scaled;
-}
-
-// Return a vector that is |v| scaled by the given scale factor.
-inline gfx::Vector2dF ScaleVector2d(gfx::Vector2dF v, float scale) {
-  return ScaleVector2d(v, scale, scale);
-}
-
 }  // namespace cc
 
 #endif  // CC_GEOMETRY_H_