CSS Motion Path: delete implementation of motion-path property

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 1212 matching lines @@
     kV8HTMLMediaElement_SrcObject_AttributeSetter = 1603,
     kCreateObjectURLBlob = 1604,
     kCreateObjectURLMediaSource = 1605,
     kCreateObjectURLMediaStream = 1606,
     kDocumentCreateTouchWindowNull = 1607,
     kDocumentCreateTouchWindowWrongType = 1608,
     kDocumentCreateTouchTargetNull = 1609,
     kDocumentCreateTouchTargetWrongType = 1610,
     kDocumentCreateTouchMoreThanSevenArguments = 1612,
     kLongTaskObserver = 1615,
-    kCSSMotionInEffect = 1616,
     kCSSOffsetInEffect = 1617,
     // The above items are available in M55 branch
 
     kVRGetDisplaysInsecureOrigin = 1618,
     kVRRequestPresent = 1619,
     kVRRequestPresentInsecureOrigin = 1620,
     kVRDeprecatedFieldOfView = 1621,
     kVideoInCanvas = 1622,
     kHiddenAutoplayedVideoInCanvas = 1623,
     kOffscreenCanvas = 1624,
@@ skipping 446 matching lines @@
     // Tracks what features/properties need to be reported to the legacy
     // histograms.
     BitVector feature_bits_;
     BitVector css_bits_;
   } legacy_counter_;
 };
 
 }  // namespace blink
 
 #endif  // UseCounter_h