Deprecate use of user gestures during scroll-related touch events

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 1074 matching lines @@
         ImageDocument = 1274,
         ScriptPassesCSPDynamic = 1275,
         ScriptPassesCSPNonce = 1276,
         CSPWithUnsafeDynamic = 1277,
         ScrollAnchored = 1278,
         AddEventListenerFourArguments = 1279,
         RemoveEventListenerFourArguments = 1280,
         InvalidReportUriDirectiveInMetaCSP = 1281,
         InvalidSandboxDirectiveInMetaCSP = 1282,
         InvalidFrameAncestorsDirectiveInMetaCSP = 1283,
-        TouchDragUserGestureUsed = 1284,
         DocumentCreateEventForeignFetchEvent = 1286,
         SVGCalcModeDiscrete = 1287,
         SVGCalcModeLinear = 1288,
         SVGCalcModePaced = 1289,
         SVGCalcModeSpline = 1290,
         FormSubmissionStarted = 1291,
         FormValidationStarted = 1292,
         FormValidationAbortedSubmission = 1293,
         FormValidationShowedMessage = 1294,
         WebAnimationsEasingAsFunctionLinear = 1295,
@@ skipping 75 matching lines @@
         DurableStoragePersist = 1369,
         DurableStoragePersisted = 1370,
         DurableStorageEstimate = 1371,
         UntrustedEventDefaultHandled = 1372,
         FixedRasterScaleBlurryContent = 1373,
         FixedRasterScalePotentialPerformanceRegression = 1374,
         CSSDeepCombinatorAndShadow = 1375,
         OpacityWithPreserve3DQuirk = 1376,
         CSSSelectorPseudoReadOnly = 1377,
         CSSSelectorPseudoReadWrite = 1378,
+        // The above items are available in M52 branch
+
         UnloadHandler_Navigation = 1379,
+        TouchStartUserGestureUtilized = 1380,
+        TouchMoveUserGestureUtilized = 1381,
+        TouchEndDuringScrollUserGestureUtilized = 1382,
 
         // 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 74 matching lines @@
     friend class UseCounterTest;
     static int m_muteCount;
 
     CountBits m_countBits;
     BitVector m_CSSFeatureBits;
 };
 
 } // namespace blink
 
 #endif // UseCounter_h