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

content/browser/renderer_host/render_widget_host_unittest.cc

Index: content/browser/renderer_host/render_widget_host_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_unittest.cc b/content/browser/renderer_host/render_widget_host_unittest.cc
index 75185179fd9fb39db99a7f5cad1aecaac6f85424..ad51e3a71573f50e2e0a48f61af38dd4d1c4d25d 100644
--- a/content/browser/renderer_host/render_widget_host_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_unittest.cc
@@ -528,7 +528,7 @@ class RenderWidgetHostTest : public testing::Test {
   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));
   }
 
@@ -1628,7 +1628,8 @@ TEST_F(RenderWidgetHostTest, InputEventRWHLatencyComponent) {
   // 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(