Ignore the rest of the scroll sequence if GSB is ignored.

ui/events/blink/input_handler_proxy.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 UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_
 #define UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_
 
 #include <memory>
 
 #include "base/containers/hash_tables.h"
@@ skipping 198 matching lines @@
   // happen via the SynchronouslyAnimate() call instead of coming directly from
   // the InputHandler.
   SynchronousInputHandler* synchronous_input_handler_;
   bool allow_root_animate_;
 
 #ifndef NDEBUG
   bool expect_scroll_update_end_;
 #endif
   bool gesture_scroll_on_impl_thread_;
   bool gesture_pinch_on_impl_thread_;
+  bool scroll_sequence_ignored_;
   // This is always false when there are no flings on the main thread, but
   // conservative in the sense that we might not be actually flinging when it is
   // true.
   bool fling_may_be_active_on_main_thread_;
   // The axes on which the current fling is allowed to scroll.  If a given fling
   // has overscrolled on a particular axis, further fling scrolls on that axis
   // will be disabled.
   bool disallow_horizontal_fling_scroll_;
   bool disallow_vertical_fling_scroll_;
 
@@ skipping 33 matching lines @@
   bool has_ongoing_compositor_scroll_fling_pinch_;
 
   std::unique_ptr<base::TickClock> tick_clock_;
 
   DISALLOW_COPY_AND_ASSIGN(InputHandlerProxy);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_BLINK_INPUT_HANDLER_PROXY_H_