Include <algorithm> if you use functions from <algorithm>.

third_party/WebKit/Source/core/css/CSSGradientValue.cpp

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2015 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 23 matching lines @@
 #include "core/dom/NodeComputedStyle.h"
 #include "core/dom/TextLinkColors.h"
 #include "core/layout/LayoutObject.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/Gradient.h"
 #include "platform/graphics/GradientGeneratedImage.h"
 #include "platform/graphics/Image.h"
 #include "platform/graphics/skia/SkiaUtils.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/WTFString.h"
+#include <algorithm>
 #include <utility>
 
 namespace blink {
 
 DEFINE_TRACE(CSSGradientColorStop)
 {
     visitor->trace(m_position);
     visitor->trace(m_color);
 }
 
@@ skipping 1164 matching lines @@
     visitor->trace(m_firstRadius);
     visitor->trace(m_secondRadius);
     visitor->trace(m_shape);
     visitor->trace(m_sizingBehavior);
     visitor->trace(m_endHorizontalSize);
     visitor->trace(m_endVerticalSize);
     CSSGradientValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink