DevTools: Basic support of multiple targets for CPU profiler

Source/devtools/front_end/sdk/CPUProfilerModel.js

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 32 matching lines @@
     target.profilerAgent().enable();
 }
 
 WebInspector.CPUProfilerModel.EventTypes = {
     ProfileStarted: "profile-started",
     ProfileStopped: "profile-stopped"
 };
 
 WebInspector.CPUProfilerModel.prototype = {
     /**
-      * @param {!WebInspector.CPUProfilerModel.Delegate} delegate
+      * @param {?WebInspector.CPUProfilerModel.Delegate} delegate
       */
     setDelegate: function(delegate)
     {
         this._delegate = delegate;
     },
 
     /**
      * @param {string} id
      * @param {!DebuggerAgent.Location} scriptLocation
      * @param {!ProfilerAgent.CPUProfile} cpuProfile
      * @param {string=} title
      */
     consoleProfileFinished: function(id, scriptLocation, cpuProfile, title)
     {
         // Make sure ProfilesPanel is initialized and CPUProfileType is created.
         WebInspector.moduleManager.loadModule("profiler");
-        this._delegate.consoleProfileFinished(id, WebInspector.DebuggerModel.Location.fromPayload(this.target(), scriptLocation), cpuProfile, title);
+        if (this._delegate)
+            this._delegate.consoleProfileFinished(id, WebInspector.DebuggerModel.Location.fromPayload(this.target(), scriptLocation), cpuProfile, title);
     },
 
     /**
      * @param {string} id
      * @param {!DebuggerAgent.Location} scriptLocation
      * @param {string=} title
      */
     consoleProfileStarted: function(id, scriptLocation, title)
     {
         // Make sure ProfilesPanel is initialized and CPUProfileType is created.
         WebInspector.moduleManager.loadModule("profiler");
-        this._delegate.consoleProfileStarted(id, WebInspector.DebuggerModel.Location.fromPayload(this.target(), scriptLocation), title);
-    },
-
-    /**
-      * @param {boolean} isRecording
-      */
-    setRecording: function(isRecording)
-    {
-        this._isRecording = isRecording;
-        this.dispatchEventToListeners(isRecording ?
-            WebInspector.CPUProfilerModel.EventTypes.ProfileStarted :
-            WebInspector.CPUProfilerModel.EventTypes.ProfileStopped);
+        if (this._delegate)
+             this._delegate.consoleProfileStarted(id, WebInspector.DebuggerModel.Location.fromPayload(this.target(), scriptLocation), title);
     },
 
     /**
       * @return {boolean}
       */
     isRecordingProfile: function()
     {
         return this._isRecording;
     },
 
+    startRecording: function()
+    {
+        this._isRecording = true;
+        this.target().profilerAgent().start();
+        this.dispatchEventToListeners(WebInspector.CPUProfilerModel.EventTypes.ProfileStarted);
+        WebInspector.userMetrics.ProfilesCPUProfileTaken.record();
+    },
+
+    /**
+     * @param {!function(?string,?ProfilerAgent.CPUProfile)} callback
+     */
+    stopRecording: function(callback)
+    {
+        this._isRecording = false;
+        this.target().profilerAgent().stop(callback);
+        this.dispatchEventToListeners(WebInspector.CPUProfilerModel.EventTypes.ProfileStopped);
+    },
+
     __proto__: WebInspector.TargetAwareObject.prototype
 }
 
 /** @interface */
 WebInspector.CPUProfilerModel.Delegate = function() {};
 
 WebInspector.CPUProfilerModel.Delegate.prototype = {
     /**
      * @param {string} protocolId
      * @param {!WebInspector.DebuggerModel.Location} scriptLocation
      * @param {string=} title
      */
     consoleProfileStarted: function(protocolId, scriptLocation, title) {},
 
     /**
      * @param {string} protocolId
      * @param {!WebInspector.DebuggerModel.Location} scriptLocation
      * @param {!ProfilerAgent.CPUProfile} cpuProfile
      * @param {string=} title
      */
     consoleProfileFinished: function(protocolId, scriptLocation, cpuProfile, title) {}
 }
 
 /**
  * @type {!WebInspector.CPUProfilerModel}
  */
 WebInspector.cpuProfilerModel;