ui/gfx: Add ToString() function to Point class.

ui/gfx/point.cc

Index: ui/gfx/point.cc
diff --git a/ui/gfx/point.cc b/ui/gfx/point.cc
index 0dc5274e8cabe3d3a1d338811445ba8e8b8a551e..ba9ced7b9594bf83fbbdc088115600a5e8900791 100644
--- a/ui/gfx/point.cc
+++ b/ui/gfx/point.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -8,7 +8,7 @@
 #include <windows.h>
 #endif
 
-#include <ostream>
+#include "base/stringprintf.h"
 
 namespace gfx {
 
@@ -49,8 +49,8 @@ CGPoint Point::ToCGPoint() const {
 }
 #endif
 
-std::ostream& operator<<(std::ostream& out, const gfx::Point& p) {
-  return out << p.x() << "," << p.y();
+std::string Point::ToString() const {
+  return base::StringPrintf("%d,%d", x_, y_);
 }
 
 }  // namespace gfx