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

ui/gfx/box_f.cc

 // Copyright 2013 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/box_f.h"
 
+#include <algorithm>
+
 #include "base/strings/stringprintf.h"
 
 namespace gfx {
 
 std::string BoxF::ToString() const {
   return base::StringPrintf("%s %fx%fx%f",
                             origin().ToString().c_str(),
                             width_,
                             height_,
                             depth_);
@@ skipping 26 matching lines @@
   depth_ = max_z - min_z;
 }
 
 BoxF UnionBoxes(const BoxF& a, const BoxF& b) {
   BoxF result = a;
   result.Union(b);
   return result;
 }
 
 }  // namespace gfx