Migrate WTF::HashMap::get() to ::at()

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2005, 2006, 2008, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Holger Hans Peter Freyther
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 975 matching lines @@
         nbDefaulted, libxmlAttributes)));
     return;
   }
 
   if (!updateLeafTextNode())
     return;
 
   AtomicString adjustedURI = uri;
   if (m_parsingFragment && adjustedURI.isNull()) {
     if (!prefix.isNull())
-      adjustedURI = m_prefixToNamespaceMap.get(prefix);
+      adjustedURI = m_prefixToNamespaceMap.at(prefix);
     else
       adjustedURI = m_defaultNamespaceURI;
   }
 
   bool isFirstElement = !m_sawFirstElement;
   m_sawFirstElement = true;
 
   QualifiedName qName(prefix, localName, adjustedURI);
   Element* newElement =
       m_currentNode->document().createElement(qName, CreatedByParser);
@@ skipping 702 matching lines @@
   RefPtr<XMLParserContext> parser =
       XMLParserContext::createStringParser(&sax, &state);
   String parseString = "<?xml version=\"1.0\"?><attrs " + string + " />";
   parseChunk(parser->context(), parseString);
   finishParsing(parser->context());
   attrsOK = state.gotAttributes;
   return state.attributes;
 }
 
 }  // namespace blink