add missing #includes of <algorithm>, needed on VS2013 for std::min/max

ui/gfx/rect_conversions.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_conversions.h"
 
+#include <algorithm>
 #include <cmath>
 
 #include "base/logging.h"
 #include "ui/gfx/safe_integer_conversions.h"
 
 namespace gfx {
 
 Rect ToEnclosingRect(const RectF& rect) {
   int min_x = ToFlooredInt(rect.x());
   int min_y = ToFlooredInt(rect.y());
@@ skipping 55 matching lines @@
 
 Rect ToFlooredRectDeprecated(const RectF& rect) {
   return Rect(ToFlooredInt(rect.x()),
               ToFlooredInt(rect.y()),
               ToFlooredInt(rect.width()),
               ToFlooredInt(rect.height()));
 }
 
 }  // namespace gfx