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

ui/events/blink/input_handler_proxy_unittest.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 "ui/events/blink/input_handler_proxy.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/macros.h"
@@ skipping 732 matching lines @@
   // sequence on the floor, except for the ScrollEnd.
   expected_disposition_ = InputHandlerProxy::DROP_EVENT;
   VERIFY_AND_RESET_MOCKS();
 
   EXPECT_CALL(mock_input_handler_, ScrollBegin(testing::_, testing::_))
       .WillOnce(testing::Return(kScrollIgnoredScrollState));
 
   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());
   EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(gesture_));
 
   VERIFY_AND_RESET_MOCKS();
 }
 
 TEST_P(InputHandlerProxyTest, GestureScrollByPage) {
   // We should send all events to the widget for this gesture.
@@ skipping 3146 matching lines @@
 INSTANTIATE_TEST_CASE_P(AnimateInput,
                         InputHandlerProxyWithoutWheelScrollLatchingTest,
                         testing::ValuesIn(test_types));
 
 INSTANTIATE_TEST_CASE_P(InputHandlerProxyEventQueueTests,
                         InputHandlerProxyEventQueueTest,
                         testing::Bool());
 
 }  // namespace test
 }  // namespace ui