Add touch scrolling modes experimental flags (DEPRECATED)

content/browser/renderer_host/input/gesture_event_queue.h

Index: content/browser/renderer_host/input/gesture_event_queue.h
diff --git a/content/browser/renderer_host/input/gesture_event_queue.h b/content/browser/renderer_host/input/gesture_event_queue.h
index 8855453494f884714463a96b278c789eafd25cce..c61ce28e06c1bfea09d527df2c6a5be87a8f766f 100644
--- a/content/browser/renderer_host/input/gesture_event_queue.h
+++ b/content/browser/renderer_host/input/gesture_event_queue.h
@@ -63,14 +63,20 @@ class CONTENT_EXPORT GestureEventQueue {
       PENDING,                 // The sequence has yet to receive an ack.
       ALLOWED_UNTIL_PREVENTED, // Gestures in the sequence are allowed until
                                // a source touch is preventDefault'ed.
-      ALWAYS_ALLOWED,          // All remaining sequence gestures are forwarded.
-      ALWAYS_PREVENTED         // All remaining sequence gestures are dropped.
+      ALWAYS_ALLOWED,          // All remaining sequence gestures are forwarded
+                               // except for independent packets whose
+                               // corresponding touch was consumed.
+      ALWAYS_PREVENTED         // All remaining sequence gestures are dropped,
+                               // except for 'ending' gestures which are
+                               // needed to complete a previous sequence.
     };
     GestureHandlingState state_;
   };
   void UpdateAndDispatchPackets(GestureSequence* sequence,
                                 InputEventAckState ack_result);
-  void SendPacket(const GestureEventPacket& packet);
+  void FilterAndSendPacket(const GestureEventPacket& packet,
+                           bool gesturePrevented,
+                           InputEventAckState ack_state);
   void SendGesture(const blink::WebGestureEvent& gesture);
   void CancelTapIfNecessary();
   void CancelFlingIfNecessary();
@@ -86,6 +92,11 @@ class CONTENT_EXPORT GestureEventQueue {
   bool needs_tap_ending_event_;
   bool needs_fling_ending_event_;
 
+  // Bookkeeping to ensure that scroll/pinch sequences are terminated
+  // whenever they are started, regardless of the disposition.
+  bool needs_scroll_ending_event_;
+  bool needs_pinch_ending_event_;
+
   DISALLOW_COPY_AND_ASSIGN(GestureEventQueue);
 };