Mac: Enable partial swap

ui/gfx/geometry/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/geometry/rect_f.h"
 
 #include <algorithm>
 
+#if defined(OS_IOS)
+#include <CoreGraphics/CoreGraphics.h>
+#elif defined(OS_MACOSX)
+#include <ApplicationServices/ApplicationServices.h>
+#endif
+
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "ui/gfx/geometry/insets_f.h"
 #include "ui/gfx/geometry/safe_integer_conversions.h"
 
 namespace gfx {
 
 static void AdjustAlongAxis(float dst_origin,
                             float dst_size,
                             float* origin,
                             float* size) {
   *size = std::min(dst_size, *size);
   if (*origin < dst_origin)
     *origin = dst_origin;
   else
     *origin = std::min(dst_origin + dst_size, *origin + *size) - *size;
 }
 
+#if defined(OS_MACOSX)
+RectF::RectF(const CGRect& r)
+    : origin_(r.origin.x, r.origin.y), size_(r.size.width, r.size.height) {
+}
+
+CGRect RectF::ToCGRect() const {
+  return CGRectMake(x(), y(), width(), height());
+}
+#endif
+
 void RectF::Inset(const InsetsF& insets) {
   Inset(insets.left(), insets.top(), insets.right(), insets.bottom());
 }
 
 void RectF::Inset(float left, float top, float right, float bottom) {
   origin_ += Vector2dF(left, top);
   set_width(std::max(width() - left - right, static_cast<float>(0)));
   set_height(std::max(height() - top - bottom, static_cast<float>(0)));
 }
 
@@ skipping 200 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