Add use counters to determine the fate of DOMStringList

Source/core/frame/UseCounter.h

 /*
  * Copyright (C) 2012 Google, 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 701 matching lines @@
         V8SecurityPolicyViolationEvent_DocumentURI_AttributeGetter = 806,
         V8SecurityPolicyViolationEvent_BlockedURI_AttributeGetter = 807,
         V8SecurityPolicyViolationEvent_StatusCode_AttributeGetter = 808,
         HTMLLinkElementDisabled = 809,
         V8HTMLLinkElement_Disabled_AttributeGetter = 810,
         V8HTMLLinkElement_Disabled_AttributeSetter = 811,
         V8HTMLStyleElement_Disabled_AttributeGetter = 812,
         V8HTMLStyleElement_Disabled_AttributeSetter = 813,
         V8FileReader_ReadAsBinaryString_Method = 814,
         V8FileReaderSync_ReadAsBinaryString_Method = 815,
+        V8DOMStringList_Item_Method = 816,
+        V8Location_AncestorOrigins_AttributeGetter = 817,
+        V8IDBDatabase_ObjectStoreNames_AttributeGetter = 818,
+        IDBDatabaseTransactionStoreNamesIsDOMStringList = 819,
+        V8IDBObjectStore_IndexNames_AttributeGetter = 820,
+        V8IDBTransaction_ObjectStoreNames_AttributeGetter = 821,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
         // Also, run update_use_counter_feature_enum.py in chromium/src/tools/metrics/histograms/
         // to update the UMA mapping.
         NumberOfFeatures, // This enum value must be last.
     };
 
     // "count" sets the bit for this feature to 1. Repeated calls are ignored.
     static void count(const Frame*, Feature);
@@ skipping 83 matching lines @@
 
     bool hasRecordedMeasurement(Feature feature) const { return m_countBits.hasRecordedMeasurement(feature); }
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h