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

Source/platform/graphics/filters/SpotLightSource.h

 /*
  * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SpotLightSource_h
 #define SpotLightSource_h
 
 #include "platform/graphics/filters/LightSource.h"
+#include <algorithm>
 
 namespace blink {
 
 class PLATFORM_EXPORT SpotLightSource : public LightSource {
 public:
     static PassRefPtr<SpotLightSource> create(const FloatPoint3D& position,
         const FloatPoint3D& direction, float specularExponent, float limitingConeAngle)
     {
         return adoptRef(new SpotLightSource(position, direction, specularExponent, limitingConeAngle));
     }
@@ skipping 32 matching lines @@
     FloatPoint3D m_position;
     FloatPoint3D m_direction;
 
     float m_specularExponent;
     float m_limitingConeAngle;
 };
 
 } // namespace blink
 
 #endif // SpotLightSource_h