CPU profile displayed in three tables with a tree

runtime/observatory/lib/src/app/application.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of app;
 
 /// The observatory application. Instances of this are created and owned
 /// by the observatory_application custom element.
 class ObservatoryApplication extends Observable {
   static ObservatoryApplication app;
   final _pageRegistry = new List<Page>();
+  LocationManager _locationManager;
+  LocationManager get locationManager => _locationManager;
   @observable Page currentPage;
-  @observable final LocationManager locationManager;
   VM _vm;
   VM get vm => _vm;
   set vm(VM vm) {
     if (_vm == vm) {
       // Do nothing.
       return;
     }
     if (_vm != null) {
       // Disconnect from current VM.
       notifications.clear();
@@ skipping 11 matching lines @@
   }
   final TargetManager targets;
   @reflectable final ObservatoryApplicationElement rootElement;
 
   TraceViewElement _traceView = null;
 
   @reflectable ServiceObject lastErrorOrException;
   @observable ObservableList<ServiceEvent> notifications =
       new ObservableList<ServiceEvent>();
 
-  void _initOnce(bool chromium) {
+  void _initOnce() {
     assert(app == null);
     app = this;
     _registerPages();
     Analytics.initialize();
-    locationManager._init(this);
+    // Visit the current page.
+    locationManager._visit();
   }
 
   void removePauseEvents(Isolate isolate) {
     bool isPauseEvent(var event) {
       return (event.eventType == ServiceEvent.kPauseStart ||
               event.eventType == ServiceEvent.kPauseExit ||
               event.eventType == ServiceEvent.kPauseBreakpoint ||
               event.eventType == ServiceEvent.kPauseInterrupted ||
               event.eventType == ServiceEvent.kPauseException);
     }
@@ skipping 37 matching lines @@
     }
   }
 
   void _registerPages() {
     _pageRegistry.add(new VMPage(this));
     _pageRegistry.add(new FlagsPage(this));
     _pageRegistry.add(new InspectPage(this));
     _pageRegistry.add(new ClassTreePage(this));
     _pageRegistry.add(new DebuggerPage(this));
     _pageRegistry.add(new CpuProfilerPage(this));
+    _pageRegistry.add(new TableCpuProfilerPage(this));
     _pageRegistry.add(new AllocationProfilerPage(this));
     _pageRegistry.add(new HeapMapPage(this));
     _pageRegistry.add(new VMConnectPage(this));
     _pageRegistry.add(new ErrorViewPage(this));
     _pageRegistry.add(new MetricsPage(this));
     // Note that ErrorPage must be the last entry in the list as it is
     // the catch all.
     _pageRegistry.add(new ErrorPage(this));
   }
 
   void _onError(ServiceError error) {
     lastErrorOrException = error;
-    _visit('error/', null);
+    _visit(Uri.parse('error/'), null);
   }
 
   void _onException(ServiceException exception) {
     lastErrorOrException = exception;
     if (exception.kind == 'NetworkException') {
       // Got a network exception, visit the vm-connect page.
       this.vm = null;
       locationManager.go(locationManager.makeLink('/vm-connect/'));
     } else {
-      _visit('error/', null);
+      _visit(Uri.parse('error/'), null);
     }
   }
 
-  void _visit(String url, String args) {
-    var argsMap;
-    if (args == null) {
-      argsMap = {};
-    } else {
-      argsMap = Uri.splitQueryString(args);
-    }
-    if (argsMap['trace'] != null) {
-      var traceArg = argsMap['trace'];
+  void _visit(Uri uri, Map internalArguments) {
+    if (internalArguments['trace'] != null) {
+      var traceArg = internalArguments['trace'];
       if (traceArg == 'on') {
         Tracer.start();
       } else if (traceArg == 'off') {
         Tracer.stop();
       }
     }
     if (Tracer.current != null) {
       Tracer.current.reset();
     }
     if (_traceView != null) {
       _traceView.tracer = Tracer.current;
     }
-    Uri uri = Uri.parse(url);
     for (var i = 0; i < _pageRegistry.length; i++) {
       var page = _pageRegistry[i];
       if (page.canVisit(uri)) {
         _installPage(page);
-        page.visit(uri, argsMap);
+        page.visit(uri, internalArguments);
         return;
       }
     }
     throw new FallThroughError();
   }
 
   /// Set the Observatory application page.
   void _installPage(Page page) {
     assert(page != null);
     if (currentPage == page) {
@@ skipping 18 matching lines @@
     // Add tracing support.
     _traceView = new Element.tag('trace-view');
     _traceView.tracer = Tracer.current;
     rootElement.children.add(_traceView);
 
     // Remember page.
     currentPage = page;
   }
 
   ObservatoryApplication(this.rootElement) :
-      locationManager = new HashLocationManager(),
       targets = new TargetManager() {
+    _locationManager = new LocationManager(this);
     vm = new WebSocketVM(targets.defaultTarget);
-    _initOnce(false);
+    _initOnce();
   }
 
   void _removeDisconnectEvents() {
     notifications.removeWhere((oldEvent) {
         return (oldEvent.eventType == ServiceEvent.kVMDisconnected);
       });
   }
 
   _vmConnected(VM vm) {
     if (vm is WebSocketVM) {
       targets.add(vm.target);
     }
     _removeDisconnectEvents();
   }
 
   _vmDisconnected(VM vm) {
     if (this.vm != vm) {
       // This disconnect event occured *after* a new VM was installed.
       return;
     }
     this.vm = null;
     notifications.add(new ServiceEvent.vmDisconencted());
   }
 }