DevTools: Support properly multiple targets in sources panel

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

 var initialize_DebuggerTest = function() {
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
 {
     console.assert(WebInspector.debuggerModel.debuggerEnabled(), "Debugger has to be enabled");
     if (quiet !== undefined)
         InspectorTest._quiet = quiet;
     WebInspector.inspectorView.showPanel("sources");
 
     InspectorTest.addSniffer(WebInspector.debuggerModel, "_pausedScript", InspectorTest._pausedScript, true);
@@ skipping 96 matching lines @@
     callback = InspectorTest.safeWrap(callback);
 
     if (!InspectorTest._pausedScriptArguments)
         callback();
     else
         InspectorTest._waitUntilResumedCallback = callback;
 };
 
 InspectorTest.resumeExecution = function(callback)
 {
-    if (WebInspector.panels.sources.paused)
+    if (WebInspector.panels.sources.paused())
         WebInspector.panels.sources.togglePause();
     InspectorTest.waitUntilResumed(callback);
 };
 
 InspectorTest.waitUntilPausedAndDumpStackAndResume = function(callback, options)
 {
     InspectorTest.waitUntilPaused(paused);
     InspectorTest.addSniffer(WebInspector.CallStackSidebarPane.prototype, "setStatus", setStatus);
 
     var caption;
@@ skipping 280 matching lines @@
 InspectorTest.scriptFormatter = function()
 {
     var editorActions = WebInspector.moduleManager.instances(WebInspector.SourcesView.EditorAction);
     for (var i = 0; i < editorActions.length; ++i) {
         if (editorActions[i] instanceof WebInspector.ScriptFormatterEditorAction)
             return editorActions[i];
     }
 };
 
 };