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

ui/events/blink/input_handler_proxy_unittest.cc

Index: ui/events/blink/input_handler_proxy_unittest.cc
diff --git a/ui/events/blink/input_handler_proxy_unittest.cc b/ui/events/blink/input_handler_proxy_unittest.cc
index 4ea540adaa92410c91e3b93bceea76949f400151..80409db074ecbdbfb3f77985e6e7afa37dd4f6c5 100644
--- a/ui/events/blink/input_handler_proxy_unittest.cc
+++ b/ui/events/blink/input_handler_proxy_unittest.cc
@@ -750,7 +750,9 @@ TEST_P(InputHandlerProxyTest, GestureScrollIgnored) {
   gesture_.SetType(WebInputEvent::kGestureScrollBegin);
   EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(gesture_));
 
-  expected_disposition_ = InputHandlerProxy::DID_NOT_HANDLE;
+  // GSB is dropped and not sent to the main thread, GSE shouldn't get sent to
+  // the main thread, either.
+  expected_disposition_ = InputHandlerProxy::DROP_EVENT;
   gesture_.SetType(WebInputEvent::kGestureScrollEnd);
   EXPECT_CALL(mock_input_handler_, ScrollEnd(testing::_))
       .WillOnce(testing::Return());