Poll if tab is not visible

Continually poll for job trace
if tab is not visible in the FE.

app/assets/javascripts/jobs/store/actions.js

@@ -40,7 +40,6 @@ export const toggleSidebar = ({ dispatch, state }) => {
 };
 
 let eTagPoll;
-let isTraceReadyForRender;
 
 export const clearEtagPoll = () => {
   eTagPoll = null;
@@ -82,15 +81,9 @@ export const fetchJob = ({ state, dispatch }) => {
 
   Visibility.change(() => {
     if (!Visibility.hidden()) {
-      // This check is needed to ensure the loading icon
-      // is not shown for a finished job during a visibility change
-      if (!isTraceReadyForRender) {
-        dispatch('startPollingTrace');
-      }
       dispatch('restartPolling');
     } else {
       dispatch('stopPolling');
-      dispatch('stopPollingTrace');
     }
   });
 };
@@ -171,8 +164,6 @@ export const fetchTrace = ({ dispatch, state }) =>
       params: { state: state.traceState },
     })
     .then(({ data }) => {
-      isTraceReadyForRender = data.complete;
-
       dispatch('toggleScrollisInBottom', isScrolledToBottom());
       dispatch('receiveTraceSuccess', data);
 

app/assets/javascripts/jobs/store/mutations.js

@@ -49,7 +49,6 @@ export default {
 
   [types.SET_TRACE_TIMEOUT](state, id) {
     state.traceTimeout = id;
-    state.isTraceComplete = false;
   },
 
   /**

spec/frontend/jobs/store/mutations_spec.js

@@ -153,7 +153,6 @@ describe('Jobs Store Mutations', () => {
       mutations[types.SET_TRACE_TIMEOUT](stateCopy, id);
 
       expect(stateCopy.traceTimeout).toEqual(id);
-      expect(stateCopy.isTraceComplete).toBe(false);
     });
   });