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

Source/platform/geometry/LayoutPoint.h

 /*
  * Copyright (c) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LayoutPoint_h
 #define LayoutPoint_h
 
 #include "platform/geometry/DoublePoint.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/LayoutSize.h"
 #include "wtf/MathExtras.h"
+#include <algorithm>
 
 namespace blink {
 
 class LayoutPoint {
 public:
     LayoutPoint() { }
     LayoutPoint(LayoutUnit x, LayoutUnit y) : m_x(x), m_y(y) { }
     LayoutPoint(const IntPoint& point) : m_x(point.x()), m_y(point.y()) { }
     explicit LayoutPoint(const FloatPoint& point) : m_x(point.x()), m_y(point.y()) { }
     explicit LayoutPoint(const DoublePoint& point) : m_x(point.x()), m_y(point.y()) { }
@@ skipping 183 matching lines @@
 
 inline LayoutPoint flooredLayoutPoint(const FloatSize& s)
 {
     return flooredLayoutPoint(FloatPoint(s));
 }
 
 
 } // namespace blink
 
 #endif // LayoutPoint_h