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

third_party/WebKit/Source/modules/webdatabase/Database.cpp

Index: third_party/WebKit/Source/modules/webdatabase/Database.cpp
diff --git a/third_party/WebKit/Source/modules/webdatabase/Database.cpp b/third_party/WebKit/Source/modules/webdatabase/Database.cpp
index d7834ead3111562ef12dffd5cbfc3db12c04aff9..8c2b1e40ceb3e0936ca2a24225a6c5709db8c11f 100644
--- a/third_party/WebKit/Source/modules/webdatabase/Database.cpp
+++ b/third_party/WebKit/Source/modules/webdatabase/Database.cpp
@@ -201,7 +201,7 @@ static DatabaseGuid guidForOriginAndName(const String& origin,
 
   typedef HashMap<String, int> IDGuidMap;
   DEFINE_STATIC_LOCAL_WITH_LOCK(IDGuidMap, stringIdentifierToGUIDMap, ());
-  DatabaseGuid guid = stringIdentifierToGUIDMap.get(stringID);
+  DatabaseGuid guid = stringIdentifierToGUIDMap.at(stringID);
   if (!guid) {
     static int currentNewGUID = 1;
     guid = currentNewGUID++;
@@ -669,7 +669,7 @@ void Database::setExpectedVersion(const String& version) {
 
 String Database::getCachedVersion() const {
   MutexLocker locker(guidMutex());
-  return guidToVersionMap().get(m_guid).isolatedCopy();
+  return guidToVersionMap().at(m_guid).isolatedCopy();
 }
 
 void Database::setCachedVersion(const String& actualVersion) {