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

third_party/WebKit/Source/core/layout/svg/SVGTextQuery.cpp

 /*
  * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved.
  *
  * 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
@@ skipping 13 matching lines @@
 #include "core/layout/LayoutInline.h"
 #include "core/layout/api/LineLayoutSVGInlineText.h"
 #include "core/layout/line/InlineFlowBox.h"
 #include "core/layout/svg/LayoutSVGInlineText.h"
 #include "core/layout/svg/SVGTextFragment.h"
 #include "core/layout/svg/SVGTextMetrics.h"
 #include "core/layout/svg/line/SVGInlineTextBox.h"
 #include "platform/FloatConversion.h"
 #include "wtf/MathExtras.h"
 #include "wtf/Vector.h"
+#include <algorithm>
 
 namespace blink {
 
 // Base structure for callback user data
 struct QueryData {
     QueryData()
         : isVerticalText(false)
         , currentOffset(0)
         , textLineLayout(nullptr)
         , textBox(nullptr)
@@ skipping 565 matching lines @@
 }
 
 int SVGTextQuery::characterNumberAtPosition(const FloatPoint& position) const
 {
     CharacterNumberAtPositionData data(position);
     spatialQuery(m_queryRootLayoutObject, &data, characterNumberAtPositionCallback);
     return data.characterNumberWithin(m_queryRootLayoutObject);
 }
 
 }