Add touch scrolling modes experimental flags (DEPRECATED)

content/browser/renderer_host/input/gesture_event_queue.cc

Index: content/browser/renderer_host/input/gesture_event_queue.cc
diff --git a/content/browser/renderer_host/input/gesture_event_queue.cc b/content/browser/renderer_host/input/gesture_event_queue.cc
index 6333de09646b4921801840f7026e742ee3888241..2265ef08c2bc7d3d119ec273f1877075a054db35 100644
--- a/content/browser/renderer_host/input/gesture_event_queue.cc
+++ b/content/browser/renderer_host/input/gesture_event_queue.cc
@@ -72,7 +72,6 @@ void GestureEventQueue::OnTouchEventAck(InputEventAckState ack_state) {
   }
 
   GestureSequence& sequence = Head();
-  sequence.UpdateState(ack_state);
 
   // Dispatch the packet corresponding to the ack'ed touch, as well as any
   // additional timeout-based packets queued before the ack was received.
@@ -86,10 +85,16 @@ void GestureEventQueue::OnTouchEventAck(InputEventAckState ack_state) {
       // given ack.
       if (touch_packet_for_current_ack_handled)
         break;
+      if (!packet.is_independent())
+        sequence.UpdateState(ack_state);
       touch_packet_for_current_ack_handled = true;
     }
 
-    if (!sequence.IsGesturePrevented())
+    // In addition to the global filtering state, independent packets may be
+    // suppressed individually by their local touch ack state.
+    if (!sequence.IsGesturePrevented() &&
+        !(packet.is_independent() &&
+            ack_state == INPUT_EVENT_ACK_STATE_CONSUMED))
       SendPacket(packet);
 
     sequence.Pop();