Articulate the cancel behavior in WebMouseWheelEvent.

content/renderer/input/main_thread_event_queue_unittest.cc

Index: content/renderer/input/main_thread_event_queue_unittest.cc
diff --git a/content/renderer/input/main_thread_event_queue_unittest.cc b/content/renderer/input/main_thread_event_queue_unittest.cc
index 2361138952900703322acf5e607a980091714ac7..2a43561988118dc532040d04c2ba2848aef3b3be 100644
--- a/content/renderer/input/main_thread_event_queue_unittest.cc
+++ b/content/renderer/input/main_thread_event_queue_unittest.cc
@@ -69,9 +69,13 @@ TEST_F(MainThreadEventQueueTest, NonBlockingWheel) {
   queue_.HandleEvent(&kEvents[1], ui::LatencyInfo(), DISPATCH_TYPE_BLOCKING,
                      INPUT_EVENT_ACK_STATE_SET_NON_BLOCKING);
   ASSERT_EQ(kEvents[0].size, last_event_.size());
+  kEvents[0].dispatchType =
+      WebInputEvent::DispatchType::ListenersNonBlockingPassive;
   ASSERT_TRUE(memcmp(&last_event_[0], &kEvents[0], kEvents[0].size) == 0);
   queue_.EventHandled(blink::WebInputEvent::MouseWheel);
   ASSERT_EQ(kEvents[1].size, last_event_.size());
+  kEvents[1].dispatchType =
+      WebInputEvent::DispatchType::ListenersNonBlockingPassive;
   ASSERT_TRUE(memcmp(&last_event_[0], &kEvents[1], kEvents[1].size) == 0);
   ASSERT_EQ(WebInputEventQueueState::ITEM_PENDING, wheel_event_queue().state());
   queue_.EventHandled(blink::WebInputEvent::MouseWheel);