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

third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  * 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.
  *
@@ skipping 96 matching lines @@
 }
 
 void StyleResolverState::setCustomPropertySetForApplyAtRule(
     const String& string,
     StylePropertySet* customPropertySet) {
   m_customPropertySetsForApplyAtRule.set(string, customPropertySet);
 }
 
 StylePropertySet* StyleResolverState::customPropertySetForApplyAtRule(
     const String& string) {
-  return m_customPropertySetsForApplyAtRule.get(string);
+  return m_customPropertySetsForApplyAtRule.at(string);
 }
 
 HeapHashMap<CSSPropertyID, Member<const CSSValue>>&
 StyleResolverState::parsedPropertiesForPendingSubstitutionCache(
     const CSSPendingSubstitutionValue& value) const {
   HeapHashMap<CSSPropertyID, Member<const CSSValue>>* map =
-      m_parsedPropertiesForPendingSubstitutionCache.get(&value);
+      m_parsedPropertiesForPendingSubstitutionCache.at(&value);
   if (!map) {
     map = new HeapHashMap<CSSPropertyID, Member<const CSSValue>>;
     m_parsedPropertiesForPendingSubstitutionCache.set(&value, map);
   }
   return *map;
 }
 
 }  // namespace blink