DevTools: Basic support of multiple targets for CPU profiler

Source/devtools/front_end/sdk/CPUProfilerModel.js

Index: Source/devtools/front_end/sdk/CPUProfilerModel.js
diff --git a/Source/devtools/front_end/sdk/CPUProfilerModel.js b/Source/devtools/front_end/sdk/CPUProfilerModel.js
index 678e1888e03b42188db83dda6e67a3da133e2f5b..49986ac4b49bb283ed6aa755c501a14298c90a67 100644
--- a/Source/devtools/front_end/sdk/CPUProfilerModel.js
+++ b/Source/devtools/front_end/sdk/CPUProfilerModel.js
@@ -50,7 +50,7 @@ WebInspector.CPUProfilerModel.EventTypes = {
 
 WebInspector.CPUProfilerModel.prototype = {
     /**
-      * @param {!WebInspector.CPUProfilerModel.Delegate} delegate
+      * @param {?WebInspector.CPUProfilerModel.Delegate} delegate
       */
     setDelegate: function(delegate)
     {
@@ -67,7 +67,8 @@ WebInspector.CPUProfilerModel.prototype = {
     {
         // 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);
     },
 
     /**
@@ -79,26 +80,34 @@ WebInspector.CPUProfilerModel.prototype = {
     {
         // 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);
+        if (this._delegate)
+             this._delegate.consoleProfileStarted(id, WebInspector.DebuggerModel.Location.fromPayload(this.target(), scriptLocation), title);
     },
 
     /**
-      * @param {boolean} isRecording
+      * @return {boolean}
       */
-    setRecording: function(isRecording)
+    isRecordingProfile: function()
+    {
+        return this._isRecording;
+    },
+
+    startRecording: function()
     {
-        this._isRecording = isRecording;
-        this.dispatchEventToListeners(isRecording ?
-            WebInspector.CPUProfilerModel.EventTypes.ProfileStarted :
-            WebInspector.CPUProfilerModel.EventTypes.ProfileStopped);
+        this._isRecording = true;
+        this.target().profilerAgent().start();
+        this.dispatchEventToListeners(WebInspector.CPUProfilerModel.EventTypes.ProfileStarted);
+        WebInspector.userMetrics.ProfilesCPUProfileTaken.record();
     },
 
     /**
-      * @return {boolean}
-      */
-    isRecordingProfile: function()
+     * @param {!function(?string,?ProfilerAgent.CPUProfile)} callback
+     */
+    stopRecording: function(callback)
     {
-        return this._isRecording;
+        this._isRecording = false;
+        this.target().profilerAgent().stop(callback);
+        this.dispatchEventToListeners(WebInspector.CPUProfilerModel.EventTypes.ProfileStopped);
     },
 
     __proto__: WebInspector.TargetAwareObject.prototype