DevTools: Get rid of WebInspector.panels

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

 var initialize_Timeline = function() {
 
 // Scrub values when printing out these properties in the record or data field.
 InspectorTest.timelinePropertyFormatters = {
     children: "formatAsTypeName",
     endTime: "formatAsTypeName",
     requestId: "formatAsTypeName",
     startTime: "formatAsTypeName",
     stackTrace: "formatAsTypeName",
     url: "formatAsURL",
@@ skipping 13 matching lines @@
     identifier: "formatAsTypeName",
     clip: "formatAsTypeName",
     root: "formatAsTypeName",
     backendNodeId: "formatAsTypeName",
     networkTime: "formatAsTypeName",
     thread: "formatAsTypeName"
 };
 
 InspectorTest.timelinePresentationModel = function()
 {
-    return WebInspector.panels.timeline._currentViews[0]._presentationModel;
+    return WebInspector.inspectorView.panel("timeline")._currentViews[0]._presentationModel;
 }
 
 InspectorTest.timelineModel = function()
 {
-    return WebInspector.panels.timeline._model;
+    return WebInspector.inspectorView.panel("timeline")._model;
 }
 
 InspectorTest.startTimeline = function(callback)
 {
     InspectorTest._timelineRecords = [];
     WebInspector.inspectorView.panel("timeline").toggleTimelineButton.toggled = true;
     WebInspector.inspectorView.panel("timeline")._model._collectionEnabled = true;
     TimelineAgent.start(5, false, undefined, true, false, callback);
     function addRecord(record)
     {
@@ skipping 90 matching lines @@
     InspectorTest.evaluateWithTimeline(actions, callback);
 };
 
 InspectorTest.printTimelineRecords = function(typeName, formatter)
 {
     InspectorTest.innerPrintTimelineRecords(InspectorTest._timelineRecords, typeName, formatter);
 };
 
 InspectorTest.printTimelinePresentationRecords = function(typeName, formatter)
 {
-    InspectorTest.innerPrintTimelinePresentationRecords(WebInspector.panels.timeline._model.records(), typeName, formatter);
+    InspectorTest.innerPrintTimelinePresentationRecords(WebInspector.inspectorView.panel("timeline")._model.records(), typeName, formatter);
 };
 
 InspectorTest.printTimestampRecords = function(typeName, formatter)
 {
     InspectorTest.innerPrintTimelineRecords(InspectorTest.timelineModel().eventDividerRecords(), typeName, formatter);
 };
 
 InspectorTest.innerPrintTimelineRecords = function(records, typeName, formatter)
 {
     for (var i = 0; i < records.length; ++i) {
@@ skipping 157 matching lines @@
         return this._fileSize;
     },
 
     fileName: function()
     {
         return "fakeFile";
     }
 };
 
 };