Add a flag to update hover effect when a layout is changed

third_party/WebKit/LayoutTests/fast/events/resources/expect-cursor-update.js

 // Wait until any mouse cursor update has completed, then verify the cursor info
 // is what's expected and call the provided continuation.
 // We need to poll to ensure EventHandler's cursor update timer has had a chance to fire.
 function expectCursorUpdate(expectedInfo, completion) {
     // Need to give style application a chance to take effect first.
     requestAnimationFrame(function() {
         // Note that cursorUpdatePending should (almost?) always be true at this
         // point, but we probably shouldn't depend on that in case scheduler changes
         // result in rAF not firing until after the cursor update timer as already
         // fired.
         var onFrame = function() {
             if (internals.cursorUpdatePending) {
                 requestAnimationFrame(onFrame);
             } else {
                 shouldBeEqualToString('internals.getCurrentCursorInfo()', expectedInfo);
                 completion();
             }
         }
         requestAnimationFrame(onFrame);
     });
 }
+
+function expectSendFakeMouseMove(expectedInfo, completion) {
+    // Need to give style application a chance to take effect first.
+    requestAnimationFrame(function() {
+        // Note that fakeMouseMovePending should (almost?) always be true at this
+        // point, but we probably shouldn't depend on that in case scheduler changes
+        // result in rAF not firing until after the fake_mouse_move_event_timer_ as
+        // already fired.
+        var onFrame = function() {
+            if (internals.fakeMouseMovePending) {
+                requestAnimationFrame(onFrame);
+            } else {
+                shouldBeEqualToString('internals.getCurrentCursorInfo()', expectedInfo);
+                completion();
+            }
+        }
+        requestAnimationFrame(onFrame);
+    });
+}