Send coverage from chrome extension iframe

spec/fixtures/devtools-extensions/foo/index.html

@@ -16,6 +16,15 @@
         })
       }
 
+      function reportCoverage () {
+        var message = JSON.stringify({
+          pid: chrome.runtime.id,
+          coverage: window.__coverage__
+        })
+        var coverageMessage = `require('electron').ipcRenderer.send('report-coverage', ${message})`
+        window.chrome.devtools.inspectedWindow.eval(coverageMessage, function () {})
+      }
+
       testStorage(function (syncItems, localItems) {
         var message = JSON.stringify({
           runtimeId: chrome.runtime.id,
@@ -26,6 +35,8 @@
             sync: syncItems
           }
         })
+
+        reportCoverage()
         var sendMessage = `require('electron').ipcRenderer.send('answer', ${message})`
         window.chrome.devtools.inspectedWindow.eval(sendMessage, function () {})
       })