[DevTools]: Require explicit connection

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

 function scheduleTestFunction()
 {
     setTimeout(testFunction, 0);
 }
 
 var initialize_DebuggerTest = function() {
 
 InspectorTest.preloadPanel("sources");
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
@@ skipping 575 matching lines @@
     function contextCreated()
     {
         target.runtimeModel.removeEventListener(WebInspector.RuntimeModel.Events.ExecutionContextCreated, contextCreated);
         callback(target.runtimeModel.executionContexts()[0]);
     }
 }
 
 InspectorTest.selectThread = function(target)
 {
     var threadsPane = self.runtime.sharedInstance(WebInspector.ThreadsSidebarPane);
-    var listItem = threadsPane._debuggerModelToListItems.get(WebInspector.DebuggerModel.fromTarget(target));
+    var listItem = threadsPane._listItemForTarget(target);
     threadsPane._onListItemClick(listItem);
 }
 
 InspectorTest.evaluateOnCurrentCallFrame = function(code)
 {
     return new Promise(succ => InspectorTest.debuggerModel.evaluateOnSelectedCallFrame(code, "console", false, true, false, false, InspectorTest.safeWrap(succ)));
 }
 
 };