ui: Prefer +/- operators to apply offsets.

ui/gfx/rect_f.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/rect_f.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
@@ skipping 34 matching lines @@
       IsExpressibleAsInt(width()) && IsExpressibleAsInt(height()) &&
       IsExpressibleAsInt(right()) && IsExpressibleAsInt(bottom());
 }
 
 std::string RectF::ToString() const {
   return base::StringPrintf("%s %s",
                             origin().ToString().c_str(),
                             size().ToString().c_str());
 }
 
+RectF operator+(const RectF& lhs, const Vector2dF& rhs) {
+  RectF result(lhs);
+  result += rhs;
+  return result;
+}
+
+RectF operator-(const RectF& lhs, const Vector2dF& rhs) {
+  RectF result(lhs);
+  result -= rhs;
+  return result;
+}
+
 RectF IntersectRects(const RectF& a, const RectF& b) {
   RectF result = a;
   result.Intersect(b);
   return result;
 }
 
 RectF UnionRects(const RectF& a, const RectF& b) {
   RectF result = a;
   result.Union(b);
   return result;
@@ skipping 13 matching lines @@
 
 RectF BoundingRect(const PointF& p1, const PointF& p2) {
   float rx = std::min(p1.x(), p2.x());
   float ry = std::min(p1.y(), p2.y());
   float rr = std::max(p1.x(), p2.x());
   float rb = std::max(p1.y(), p2.y());
   return RectF(rx, ry, rr - rx, rb - ry);
 }
 
 }  // namespace gfx