[DevTools] Improve context and target naming.

third_party/WebKit/LayoutTests/http/tests/inspector/inspector-test.js

 if (window.GCController)
     GCController.collectAll();
 var initialize_InspectorTest = function() {
 
 var results = [];
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
 }
@@ skipping 430 matching lines @@
 InspectorTest.waitForUISourceCodeRemoved = function(callback)
 {
     Workspace.workspace.addEventListener(Workspace.Workspace.Events.UISourceCodeRemoved, uiSourceCodeRemoved);
     function uiSourceCodeRemoved(event)
     {
         Workspace.workspace.removeEventListener(Workspace.Workspace.Events.UISourceCodeRemoved, uiSourceCodeRemoved);
         callback(event.data);
     }
 }
 
-InspectorTest.createMockTarget = function(name, capabilities)
+InspectorTest.createMockTarget = function(name, capabilities, dontAttachToMain)
 {
-    return SDK.targetManager.createTarget(name, capabilities || SDK.Target.Capability.AllForTests, params => new SDK.StubConnection(params), null);
+    return SDK.targetManager.createTarget(name, capabilities || SDK.Target.Capability.AllForTests, params => new SDK.StubConnection(params), dontAttachToMain ? null : InspectorTest.mainTarget);
 }
 
 InspectorTest.assertGreaterOrEqual = function(a, b, message)
 {
     if (a < b)
         InspectorTest.addResult("FAILED: " + (message ? message + ": " : "") + a + " < " + b);
 }
 
 InspectorTest.navigate = function(url, callback)
 {
@@ skipping 761 matching lines @@
     _output("[page] " + text);
 }
 
 function _output(result)
 {
     if (!outputElement)
         createOutputElement();
     outputElement.appendChild(document.createTextNode(result));
     outputElement.appendChild(document.createElement("br"));
 }