Remove case-insensitive matching of usemap attribute.

third_party/WebKit/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 1157 matching lines @@
     SVGViewElement = 1500,
     WebShareShare = 1501,
     AuxclickAddListenerCount = 1502,
     HTMLCanvasElement = 1503,
     SVGSMILAnimationElementTiming = 1504,
     SVGSMILBeginEndAnimationElement = 1505,
     SVGSMILPausing = 1506,
     SVGSMILCurrentTime = 1507,
     HTMLBodyElementOnSelectionChangeAttribute = 1508,
     ForeignFetchInterception = 1509,
-    MapNameMatchingStrict = 1510,
-    MapNameMatchingASCIICaseless = 1511,
-    MapNameMatchingUnicodeLower = 1512,
     InputSelectionGettersThrow = 1517,
     UsbGetDevices = 1519,
     UsbRequestDevice = 1520,
     UsbDeviceOpen = 1521,
     UsbDeviceClose = 1522,
     UsbDeviceSelectConfiguration = 1523,
     UsbDeviceClaimInterface = 1524,
     UsbDeviceReleaseInterface = 1525,
     UsbDeviceSelectAlternateInterface = 1526,
     UsbDeviceControlTransferIn = 1527,
@@ skipping 334 matching lines @@
     // Tracks what features/properties need to be reported to the legacy
     // histograms.
     BitVector m_featureBits;
     BitVector m_CSSBits;
   } m_legacyCounter;
 };
 
 }  // namespace blink
 
 #endif  // UseCounter_h