Avoid WTF::Vector::at() and operator[] in core/html.

third_party/WebKit/Source/core/html/HTMLElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004-2008, 2013, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2011 Motorola Mobility. 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
@@ skipping 401 matching lines @@
         {onwebkitanimationendAttr, EventTypeNames::webkitAnimationEnd},
         {onwebkitanimationiterationAttr,
          EventTypeNames::webkitAnimationIteration},
         {onwebkitanimationstartAttr, EventTypeNames::webkitAnimationStart},
         {onwebkitfullscreenchangeAttr, EventTypeNames::webkitfullscreenchange},
         {onwebkitfullscreenerrorAttr, EventTypeNames::webkitfullscreenerror},
         {onwebkittransitionendAttr, EventTypeNames::webkitTransitionEnd},
         {onwheelAttr, EventTypeNames::wheel},
     };
 
-    for (size_t i = 0; i < WTF_ARRAY_LENGTH(attrToEventNames); i++)
-      attributeNameToEventNameMap.set(attrToEventNames[i].attr.localName(),
-                                      attrToEventNames[i].event);
+    for (const auto& name : attrToEventNames)
+      attributeNameToEventNameMap.set(name.attr.localName(), name.event);
   }
 
   return attributeNameToEventNameMap.get(attrName.localName());
 }
 
 void HTMLElement::parseAttribute(const QualifiedName& name,
                                  const AtomicString& oldValue,
                                  const AtomicString& value) {
   if (name == tabindexAttr || name == XMLNames::langAttr)
     return Element::parseAttribute(name, oldValue, value);
@@ skipping 758 matching lines @@
 
 #ifndef NDEBUG
 
 // For use in the debugger
 void dumpInnerHTML(blink::HTMLElement*);
 
 void dumpInnerHTML(blink::HTMLElement* element) {
   printf("%s\n", element->innerHTML().ascii().data());
 }
 #endif