Use C++11 features in core/html

Source/core/html/parser/HTMLParserIdioms.cpp

 /*
  * Copyright (C) 2010 Apple 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 307 matching lines @@
     Charset,
     Pragma,
 };
 
 WTF::TextEncoding encodingFromMetaAttributes(const HTMLAttributeList& attributes)
 {
     bool gotPragma = false;
     Mode mode = None;
     String charset;
 
-    for (HTMLAttributeList::const_iterator iter = attributes.begin(); iter != attributes.end(); ++iter) {
-        const String& attributeName = iter->first;
-        const String& attributeValue = AtomicString(iter->second);
+    for (const auto& htmlAttribute : attributes) {
+        const String& attributeName = htmlAttribute.first;
+        const String& attributeValue = AtomicString(htmlAttribute.second);
 
         if (threadSafeMatch(attributeName, http_equivAttr)) {
             if (equalIgnoringCase(attributeValue, "content-type"))
                 gotPragma = true;
         } else if (charset.isEmpty()) {
             if (threadSafeMatch(attributeName, charsetAttr)) {
                 charset = attributeValue;
                 mode = Charset;
             } else if (threadSafeMatch(attributeName, contentAttr)) {
                 charset = extractCharset(attributeValue);
@@ skipping 26 matching lines @@
 bool threadSafeMatch(const String& localName, const QualifiedName& qName)
 {
     return threadSafeEqual(localName.impl(), qName.localName().impl());
 }
 
 template<typename CharType>
 inline StringImpl* findStringIfStatic(const CharType* characters, unsigned length)
 {
     // We don't need to try hashing if we know the string is too long.
     if (length > StringImpl::highestStaticStringLength())
-        return 0;
+        return nullptr;
     // computeHashAndMaskTop8Bits is the function StringImpl::hash() uses.
     unsigned hash = StringHasher::computeHashAndMaskTop8Bits(characters, length);
     const WTF::StaticStringsTable& table = StringImpl::allStaticStrings();
     ASSERT(!table.isEmpty());
 
     WTF::StaticStringsTable::const_iterator it = table.find(hash);
     if (it == table.end())
-        return 0;
+        return nullptr;
     // It's possible to have hash collisions between arbitrary strings and
     // known identifiers (e.g. "bvvfg" collides with "script").
     // However ASSERTs in StringImpl::createStatic guard against there ever being collisions
     // between static strings.
     if (!equal(it->value, characters, length))
-        return 0;
+        return nullptr;
     return it->value;
 }
 
 String attemptStaticStringCreation(const LChar* characters, size_t size)
 {
     String string(findStringIfStatic(characters, size));
     if (string.impl())
         return string;
     return String(characters, size);
 }
 
 String attemptStaticStringCreation(const UChar* characters, size_t size, CharacterWidth width)
 {
     String string(findStringIfStatic(characters, size));
     if (string.impl())
         return string;
     if (width == Likely8Bit)
         string = StringImpl::create8BitIfPossible(characters, size);
     else if (width == Force8Bit)
         string = String::make8BitFrom16BitSource(characters, size);
     else
         string = String(characters, size);
 
     return string;
 }
 
 }