Eager Gesture Recognition on Aura

ui/events/gestures/gesture_provider_aura.cc

Index: ui/events/gestures/gesture_provider_aura.cc
diff --git a/ui/events/gestures/gesture_provider_aura.cc b/ui/events/gestures/gesture_provider_aura.cc
index 7485cda70e9fad124277642a8c685ecd0f9f3648..bf2deb325f0d2305038ec5fe4c5def25a6335a8b 100644
--- a/ui/events/gestures/gesture_provider_aura.cc
+++ b/ui/events/gestures/gesture_provider_aura.cc
@@ -28,6 +28,17 @@ bool GestureProviderAura::OnTouchEvent(const TouchEvent& event) {
     if (event.touch_id() != pointer_state_.GetPointerId(i))
       continue;
     pointer_id_is_active = true;
+
+    // If this is a touchmove event, and it isn't different from the last
+    // event, ignore it.
+    if (event.type() == ET_TOUCH_MOVED &&
+        event.x() == pointer_state_.GetX(i) &&
+        event.y() == pointer_state_.GetY(i) &&
+        std::max(event.radius_x(), event.radius_y()) * 2 ==
+            pointer_state_.GetTouchMajor(i) &&
+        event.force() == pointer_state_.GetPressure(i)) {
+      return false;
+    }
     break;
   }