[inspector] Refactor inspector test

test/inspector/runtime/runtime-restore.js

Index: test/inspector/runtime/runtime-restore.js
diff --git a/test/inspector/runtime/runtime-restore.js b/test/inspector/runtime/runtime-restore.js
index 5c2fea5768d9f1b92147ca0cf22ddb8592464063..4020c19f81cb8c4d3f131e8e9722732841fab022 100644
--- a/test/inspector/runtime/runtime-restore.js
+++ b/test/inspector/runtime/runtime-restore.js
@@ -56,9 +56,9 @@ InspectorTest.runTestSuite([
 
   function testSetCustomObjectFormatterEnabled(next) {
     Protocol.Runtime.onConsoleAPICalled(InspectorTest.logMessage);
-    // cleanup console message storage
-    reconnect();
-    Protocol.Runtime.enable()
+    Protocol.Runtime.discardConsoleEntries()
+      .then(reconnect)
+      .then(() => Protocol.Runtime.enable())
       .then(() => Protocol.Runtime.setCustomObjectFormatterEnabled({ enabled: true }))
       .then(reconnect)
       .then(() => Protocol.Runtime.evaluate({ expression: 'console.log({ name: 42 })'}))
@@ -73,5 +73,5 @@ InspectorTest.runTestSuite([
 
 function reconnect() {
   InspectorTest.logMessage('will reconnect..');
-  utils.reconnect();
+  InspectorTest.session.reconnect();
 }