Add #include <algorithm> to code that is missing it.

Source/platform/geometry/DoublePoint.h

 // Copyright 2014 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.
 
 #ifndef DoublePoint_h
 #define DoublePoint_h
 
 #include "platform/geometry/DoubleSize.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/geometry/IntPoint.h"
+#include <algorithm>
 
 namespace blink {
 
 class LayoutPoint;
 
 class PLATFORM_EXPORT DoublePoint {
 public:
     DoublePoint()
         : m_x(0)
         , m_y(0)
@@ skipping 89 matching lines @@
 }
 
 inline DoubleSize toDoubleSize(const DoublePoint& a)
 {
     return DoubleSize(a.x(), a.y());
 }
 
 }
 
 #endif