Migrate GestureProvider tests off of QuitCurrent*Deprecated.

Bug: 844016
Change-Id: Iff5392ee536134bffa1522c4cb8bfc3ffbdb1864
Reviewed-on: https://chromium-review.googlesource.com/1129212Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#573824}

ui/events/gesture_detection/gesture_provider_unittest.cc

@@ -428,10 +428,10 @@ class GestureProviderTest : public testing::Test, public GestureProviderClient {
   }
 
   static void RunTasksAndWait(base::TimeDelta delay) {
+    base::RunLoop run_loop;
     base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
-        FROM_HERE, base::RunLoop::QuitCurrentWhenIdleClosureDeprecated(),
-        delay);
-    base::RunLoop().Run();
+        FROM_HERE, run_loop.QuitClosure(), delay);
+    run_loop.Run();
   }
 
   std::vector<GestureEventData> gestures_;