[DevTools] Stick with top frame unless user selected something else.

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

 var initialize_WorkspaceTest = function() {
 
 InspectorTest.createWorkspace = function(ignoreEvents)
 {
     if (InspectorTest.testFileSystemWorkspaceBinding)
         InspectorTest.testFileSystemWorkspaceBinding.dispose();
     if (InspectorTest.testNetworkMapping)
         InspectorTest.testNetworkMapping.dispose();
     WebInspector.fileSystemMapping.resetForTesting();
 
@@ skipping 17 matching lines @@
     });
 
     if (ignoreEvents)
         return;
     InspectorTest.testWorkspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, InspectorTest._defaultWorkspaceEventHandler);
     InspectorTest.testWorkspace.addEventListener(WebInspector.Workspace.Events.UISourceCodeRemoved, InspectorTest._defaultWorkspaceEventHandler);
 }
 
 InspectorTest._mockTargetId = 1;
 
-InspectorTest.createMockTarget = function(id, debuggerModelConstructor)
+InspectorTest.createMockTarget = function(id, debuggerModelConstructor, targetType)
 {
     var MockTarget = function(name, connection, callback)
     {
-        WebInspector.Target.call(this, InspectorTest.testTargetManager, name, WebInspector.Target.Type.Page, connection, null, callback);
+        var type = typeof targetType === "undefined" ? WebInspector.Target.Type.Page : targetType;
+        WebInspector.Target.call(this, InspectorTest.testTargetManager, name, type, connection, null, callback);
         this.consoleModel = new WebInspector.ConsoleModel(this);
         this.networkManager = new WebInspector.NetworkManager(this);
         this.resourceTreeModel = new WebInspector.ResourceTreeModel(this);
         this.resourceTreeModel._inspectedPageURL = InspectorTest.resourceTreeModel._inspectedPageURL;
         this.resourceTreeModel._cachedResourcesProcessed = true;
         this.resourceTreeModel._frameAttached("42", 0);
         this.runtimeModel = new WebInspector.RuntimeModel(this);
         this.debuggerModel = debuggerModelConstructor ? new debuggerModelConstructor(this) : new WebInspector.DebuggerModel(this);
         this._modelByConstructor.set(WebInspector.DebuggerModel, this.debuggerModel);
         this.domModel = new WebInspector.DOMModel(this);
@@ skipping 133 matching lines @@
     function uiSourceCodeAdded(event)
     {
         if (event.data.name() === name) {
             WebInspector.workspace.removeEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, uiSourceCodeAdded);
             setImmediate(callback);
         }
     }
 }
 
 };