[VSync Queue] Flush input in CommitComplete()

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 e30d729e3618c57ebcaffcc049a98b5caa21c336..8f6becce44008c78e70034011708c9494cc6f2a0 100644
--- a/ui/events/blink/input_handler_proxy_unittest.cc
+++ b/ui/events/blink/input_handler_proxy_unittest.cc
@@ -202,6 +202,10 @@ class MockInputHandler : public cc::InputHandler {
   void BindToClient(cc::InputHandlerClient* client,
                     bool touchpad_and_wheel_scroll_latching_enabled) override {}
 
+  InputHandlerState GetInputHandlerState() const override {
+    return input_handler_state_;
+  }
+
   void MouseDown() override {}
   void MouseUp() override {}
   void MouseLeave() override {}
@@ -227,9 +231,13 @@ class MockInputHandler : public cc::InputHandler {
     return is_scrolling_root_;
   }
   void set_is_scrolling_root(bool is) { is_scrolling_root_ = is; }
+  void set_input_handler_state(InputHandlerState input_handler_state) {
+    input_handler_state_ = input_handler_state;
+  }
 
  private:
   bool is_scrolling_root_ = true;
+  InputHandlerState input_handler_state_ = InputHandlerState::IDLE;
   DISALLOW_COPY_AND_ASSIGN(MockInputHandler);
 };
 
@@ -527,6 +535,13 @@ class InputHandlerProxyEventQueueTest : public testing::TestWithParam<bool> {
     if (input_handler_proxy_->compositor_event_queue_)
       input_handler_proxy_->compositor_event_queue_ =
           base::MakeUnique<CompositorThreadEventQueue>();
+    mock_input_handler_.set_input_handler_state(
+        cc::InputHandler::InputHandlerState::INSIDE_IMPL_FRAME);
+  }
+
+  void TearDown() override {
+    mock_input_handler_.set_input_handler_state(
+        cc::InputHandler::InputHandlerState::IDLE);
   }
 
   void StartTracing() {