Wheel scroll latching enabled behind flag.

third_party/WebKit/LayoutTests/VirtualTestSuites

 [
   {
     "prefix": "gpu",
     "base": "fast/canvas",
     "args": ["--enable-accelerated-2d-canvas",
              "--disable-display-list-2d-canvas"]
   },
   {
     "prefix": "display_list_2d_canvas",
     "base": "fast/canvas",
@@ skipping 247 matching lines @@
     "prefix": "documentwriteevaluator",
     "base": "http/tests/preload/document-write",
     "args": ["--enable-blink-features=DocumentWriteEvaluator"]
   },
   {
     "prefix": "asyncawait",
     "base": "inspector/sources/debugger-async/async-await",
     "args": ["--js-flags=--harmony-async-await"]
   },
   {
+    "prefix": "wheelscrolllatching",
+    "base": "fast/events/wheel",
+    "args": ["--enable-features=TouchpadAndWheelScrollLatching"]
+  },
+  {
     "prefix": "parsehtmlonmainthread_sync",
     "base": "fast/parser",
     "args": ["--blink-settings=parseHTMLOnMainThreadSyncTokenize=true"]
   },
   {
     "prefix": "parsehtmlonmainthread_coalesce",
     "base": "fast/parser",
     "args": ["--disable-blink-features=ParseHTMLOnMainThread", "--blink-settings=parseHTMLOnMainThreadCoalesceChunks=true"]
   },
   {
     "prefix": "mojo-loading",
     "base": "webexposed",
     "args": ["--enable-blink-features=LoadingWithMojo"]
   }
 ]