Ignore unknown options to subresource integrity

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 568 matching lines @@
         AudioContextCreateWaveShaper = 648,
         AudioContextDecodeAudioData = 649,
         AudioContextResume = 650,
         AudioContextSuspend = 651,
         AudioContext = 652,
         OfflineAudioContext = 653,
         PrefixedAudioContext = 654,
         PrefixedOfflineAudioContext = 655,
         AddEventListenerNoArguments = 656,
         RemoveEventListenerNoArguments = 658,
-        SRIElementWithNonMatchingIntegrityType = 660,
+        DeprecatedSRIElementWithNonMatchingIntegrityType = 660,

[Mike West, 2015/05/11 03:25:29]

Nit: Just remove it. :)

[jww, 2015/05/11 05:39:08]

Hrm, I guess that works? I thought we weren't supposed to remove old use
counters, but I see now that there are quite a few gaps. Done.

         MixedContentInNonHTTPSFrameThatRestrictsMixedContent = 661,
         MixedContentInSecureFrameThatDoesNotRestrictMixedContent = 662,
         MixedContentWebSocket = 663,
         SyntheticKeyframesInCompositedCSSAnimation = 664,
         MixedContentFormPresent = 665,
         GetUserMediaInsecureOrigin = 666,
         GetUserMediaSecureOrigin = 667,
         // The above items are available in M41 branch.
 
         DeviceMotionInsecureOrigin = 668,
@@ skipping 197 matching lines @@
 
     bool hasRecordedMeasurement(Feature feature) const { return m_countBits.hasRecordedMeasurement(feature); }
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h