Don't restart the hang renderer timeout on messages ack'd from the compositor thread.

content/browser/renderer_host/render_widget_host_unittest.cc

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <tuple>
 
@@ skipping 510 matching lines @@
   }
 
   virtual void ConfigureView(TestView* view) {
   }
 
   int64_t GetLatencyComponentId() { return host_->GetLatencyComponentId(); }
 
   void SendInputEventACK(WebInputEvent::Type type,
                          InputEventAckState ack_result) {
     DCHECK(!WebInputEvent::isTouchEventType(type));
-    InputEventAck ack(type, ack_result);
+    InputEventAck ack(InputEventAckSource::COMPOSITOR_THREAD, type, ack_result);
     host_->OnMessageReceived(InputHostMsg_HandleInputEvent_ACK(0, ack));
   }
 
   double GetNextSimulatedEventTimeSeconds() {
     last_simulated_event_time_seconds_ += simulated_event_time_delta_seconds_;
     return last_simulated_event_time_seconds_;
   }
 
   void SimulateKeyboardEvent(WebInputEvent::Type type) {
     SimulateKeyboardEvent(type, 0);
@@ skipping 1079 matching lines @@
                                       blink::WebGestureDeviceTouchscreen,
                                       ui::LatencyInfo());
   CheckLatencyInfoComponentInMessage(
       process_, GetLatencyComponentId(), WebInputEvent::GestureScrollUpdate);
   SendInputEventACK(WebInputEvent::GestureScrollUpdate,
                     INPUT_EVENT_ACK_STATE_CONSUMED);
 
   // Tests RWHI::ForwardTouchEventWithLatencyInfo().
   PressTouchPoint(0, 1);
   uint32_t touch_event_id = SendTouchEvent();
-  InputEventAck ack(WebInputEvent::TouchStart, INPUT_EVENT_ACK_STATE_CONSUMED,
+  InputEventAck ack(InputEventAckSource::COMPOSITOR_THREAD,
+                    WebInputEvent::TouchStart, INPUT_EVENT_ACK_STATE_CONSUMED,
                     touch_event_id);
   host_->OnMessageReceived(InputHostMsg_HandleInputEvent_ACK(0, ack));
   CheckLatencyInfoComponentInMessage(
       process_, GetLatencyComponentId(), WebInputEvent::TouchStart);
 }
 
 TEST_F(RenderWidgetHostTest, RendererExitedResetsInputRouter) {
   // RendererExited will delete the view.
   host_->SetView(new TestView(host_.get()));
   host_->RendererExited(base::TERMINATION_STATUS_PROCESS_CRASHED, -1);
@@ skipping 65 matching lines @@
                                       ui::LatencyInfo());
 
 
   // Tests RWHI::ForwardWheelEventWithLatencyInfo().
   SimulateWheelEventWithLatencyInfo(-5, 0, 0, true, ui::LatencyInfo());
 
   ASSERT_FALSE(host_->input_router()->HasPendingEvents());
 }
 
 }  // namespace content