aura: Allow held touch-events to contribute to gesture events.

ui/aura/window_event_dispatcher.cc

Index: ui/aura/window_event_dispatcher.cc
diff --git a/ui/aura/window_event_dispatcher.cc b/ui/aura/window_event_dispatcher.cc
index 3dc74329b4c817ab47d05b155ed2525843b6e40a..0f4715066fad90842b2a2f2eea23251e15ad2909 100644
--- a/ui/aura/window_event_dispatcher.cc
+++ b/ui/aura/window_event_dispatcher.cc
@@ -470,8 +470,10 @@ ui::EventDispatchDetails WindowEventDispatcher::PostDispatchEvent(
 #endif
 
   if (event.IsTouchEvent() && !details.target_destroyed) {
-    // Do not let 'held' touch events contribute to any gestures.
-    if (!held_move_event_ || !held_move_event_->IsTouchEvent()) {
+    // Do not let 'held' touch events contribute to any gestures unless it is
+    // being dispatched.
+    if (dispatching_held_event_ || !held_move_event_ ||
+        !held_move_event_->IsTouchEvent()) {
       ui::TouchEvent orig_event(static_cast<const ui::TouchEvent&>(event),
                                 static_cast<Window*>(event.target()), window());
       // Get the list of GestureEvents from GestureRecognizer.