[inspector] enable inspector by default

test/inspector/protocol-test.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 InspectorTest = {};
 InspectorTest._dispatchTable = new Map();
 InspectorTest._requestId = 0;
 InspectorTest._dumpInspectorProtocolMessages = false;
 InspectorTest._eventHandler = {};
 
@@ skipping 82 matching lines @@
     lines.push(firstLinePrefix + "[");
     for (var i = 0; i < object.length; ++i)
       dumpValue(object[i], "    " + prefix, "    " + prefix + "[" + i + "] : ");
     lines.push(prefix + "]");
   }
 
   dumpValue(object, "", title);
   InspectorTest.log(lines.join("\n"));
 }
 
-InspectorTest.completeTest = quit.bind(null);
+InspectorTest.completeTest = function()
+{
+  Protocol.Debugger.disable().then(() => quit());
+}
 
 InspectorTest.completeTestAfterPendingTimeouts = function()
 {
   Protocol.Runtime.evaluate({
     expression: "new Promise(resolve => setTimeout(resolve, 0))",
     awaitPromise: true }).then(InspectorTest.completeTest);
 }
 
 InspectorTest.addScript = function(string)
 {
@@ skipping 87 matching lines @@
       var eventName = messageObject["method"];
       var eventHandler = InspectorTest._eventHandler[eventName];
       if (eventHandler)
         eventHandler(messageObject);
     }
   } catch (e) {
     InspectorTest.log("Exception when dispatching message: " + e + "\n" + e.stack + "\n message = " + JSON.stringify(messageObject, null, 2));
     InspectorTest.completeTest();
   }
 }