Make the ContentGestureProvider a ui::FilteredGestureProvider

content/browser/renderer_host/input/touch_event_queue.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/input/touch_event_queue.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/stl_util.h"
@@ skipping 328 matching lines @@
   dispatching_touch_ = false;
 
   if (timeout_handler_ && timeout_handler_->ConfirmTouchEvent(ack_result))
     return;
 
   touchmove_slop_suppressor_->ConfirmTouchEvent(ack_result);
 
   if (touch_queue_.empty())
     return;
 
-  if (ack_result == INPUT_EVENT_ACK_STATE_CONSUMED &&
-      touch_filtering_state_ == FORWARD_TOUCHES_UNTIL_TIMEOUT)
-    touch_filtering_state_ = FORWARD_ALL_TOUCHES;
-
   const WebTouchEvent& acked_event =
       touch_queue_.front()->coalesced_event().event;
+
+  if (ack_result == INPUT_EVENT_ACK_STATE_CONSUMED &&
+      touch_filtering_state_ == FORWARD_TOUCHES_UNTIL_TIMEOUT) {
+    touch_filtering_state_ = FORWARD_ALL_TOUCHES;
+  }
+
+  if (ack_result == INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS &&
+      touch_filtering_state_ != DROP_ALL_TOUCHES &&
+      WebTouchEventTraits::IsTouchSequenceStart(acked_event)) {
+    touch_filtering_state_ = DROP_TOUCHES_IN_SEQUENCE;
+  }
+
   UpdateTouchAckStates(acked_event, ack_result);
   PopTouchEventToClient(ack_result, latency_info);
   TryForwardNextEventToRenderer();
 }
 
 void TouchEventQueue::TryForwardNextEventToRenderer() {
   DCHECK(!dispatching_touch_ack_);
   // If there are queued touch events, then try to forward them to the renderer
   // immediately, or ACK the events back to the client if appropriate.
   while (!touch_queue_.empty()) {
@@ skipping 244 matching lines @@
   } else if (event.type == WebInputEvent::TouchStart) {
     for (unsigned i = 0; i < event.touchesLength; ++i) {
       const WebTouchPoint& point = event.touches[i];
       if (point.state == WebTouchPoint::StatePressed)
         touch_ack_states_[point.id] = ack_result;
     }
   }
 }
 
 }  // namespace content