Remove prefixed EME.

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 101 matching lines @@
         XFrameOptions = 58,
         XFrameOptionsSameOrigin = 59,
         XFrameOptionsSameOriginWithBadAncestorChain = 60,
         DeprecatedFlexboxWebContent = 61,
         DeprecatedFlexboxChrome = 62,
         DeprecatedFlexboxChromeExtension = 63,
         UnprefixedPerformanceTimeline = 65,
         UnprefixedUserTiming = 67,
         WindowEvent = 69,
         ContentSecurityPolicyWithBaseElement = 70,
-        PrefixedMediaAddKey = 71,
-        PrefixedMediaGenerateKeyRequest = 72,
         DocumentClear = 74,
         XMLDocument = 77,
         XSLProcessingInstruction = 78,
         XSLTProcessor = 79,
         SVGSwitchElement = 80,
         DocumentAll = 83,
         FormElement = 84,
         DemotedFormElement = 85,
         SVGAnimationElement = 90,
         LineClamp = 96,
@@ skipping 81 matching lines @@
         HTMLElementOuterText = 214,
         ReplaceDocumentViaJavaScriptURL = 215,
         ElementSetAttributeNodeNS = 216,
         ElementPrefixedMatchesSelector = 217,
         CSSStyleSheetRules = 219,
         CSSStyleSheetAddRule = 220,
         CSSStyleSheetRemoveRule = 221,
         // The above items are available in M33 branch.
 
         InitMessageEvent = 222,
-        PrefixedMediaCancelKeyRequest = 229,
-        CanPlayTypeKeySystem = 232,
         PrefixedDevicePixelRatioMediaFeature = 233,
         PrefixedMaxDevicePixelRatioMediaFeature = 234,
         PrefixedMinDevicePixelRatioMediaFeature = 235,
         PrefixedTransform3dMediaFeature = 237,
         PrefixedStorageQuota = 240,
         ResetReferrerPolicy = 243,
         CaseInsensitiveAttrSelectorMatch = 244, // Case-insensitivity dropped from specification.
         FormNameAccessForImageElement = 246,
         FormNameAccessForPastNamesMap = 247,
         FormAssociationByParser = 248,
@@ skipping 935 matching lines @@
     friend class UseCounterTest;
     static int m_muteCount;
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h