Tap suppression controller forwards the next TapCancel when the stashed TapDown is forwarded.

content/browser/renderer_host/input/touchscreen_tap_suppression_controller.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCHSCREEN_TAP_SUPPRESSION_CONTROLLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCHSCREEN_TAP_SUPPRESSION_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 32 matching lines @@
   void ForwardStashedGestureEvents() override;
   void ForwardStashedTapDown() override;
 
   GestureEventQueue* gesture_event_queue_;
 
   typedef std::unique_ptr<GestureEventWithLatencyInfo> ScopedGestureEvent;
   ScopedGestureEvent stashed_tap_down_;
   ScopedGestureEvent stashed_show_press_;
   ScopedGestureEvent stashed_long_press_;
 
+  // This is true when the stashed GestureTapDown event gets forwarded. The
+  // controller should forward the next GestureTapCancel as well to maintain a
+  // valid input stream.
+  bool forward_next_tap_cancel_;
+
   // The core controller of tap suppression.
   TapSuppressionController controller_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchscreenTapSuppressionController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCHSCREEN_TAP_SUPPRESSION_CONTROLLER_H_