Handle touchpad flings with passive event listeners on compositor thread.

content/renderer/mus/compositor_mus_connection_unittest.cc

 // Copyright 2016 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 "content/renderer/mus/compositor_mus_connection.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 115 matching lines @@
 
   // content::InputHandlerManagerClient:
   void SetInputHandlerManager(
       content::InputHandlerManager* input_handler_manager) override {}
   void RegisterRoutingID(int routing_id) override {}
   void UnregisterRoutingID(int routing_id) override {}
   void DidOverscroll(int routing_id,
                      const ui::DidOverscrollParams& params) override {}
   void DidStartFlinging(int routing_id) override {}
   void DidStopFlinging(int routing_id) override {}
+  void DispatchNonBlockingEventToMainThread(
+      int routing_id,
+      ui::ScopedWebInputEvent event,
+      const ui::LatencyInfo& latency_info) override {}
+
   void NotifyInputEventHandled(
       int routing_id,
       blink::WebInputEvent::Type type,
       content::InputEventAckState ack_result) override {}
   void ProcessRafAlignedInput(int routing_id) override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestInputHandlerManagerClient);
 };
 
@@ skipping 344 matching lines @@
   EXPECT_FALSE(ack_callback.get());
 
   VerifyAndRunQueues(true, true);
 
   // The ack callback should have been called
   EXPECT_TRUE(test_callback->called());
   EXPECT_EQ(EventResult::HANDLED, test_callback->result());
 }
 
 }  // namespace content