DevTools: add Tracing agent on back-end

Source/core/inspector/InspectorTimelineAgent.h

Index: Source/core/inspector/InspectorTimelineAgent.h
diff --git a/Source/core/inspector/InspectorTimelineAgent.h b/Source/core/inspector/InspectorTimelineAgent.h
index d648e1f75104c2b8075687d7be59815baba500ea..3e0c78d4ab138e8d55ce532e7916ca8b10a92f08 100644
--- a/Source/core/inspector/InspectorTimelineAgent.h
+++ b/Source/core/inspector/InspectorTimelineAgent.h
@@ -69,6 +69,7 @@ class InspectorDOMAgent;
 class InspectorFrontend;
 class InspectorOverlay;
 class InspectorPageAgent;
+class InspectorTracingAgent;
 class InspectorLayerTreeAgent;
 class InstrumentingAgents;
 class KURL;
@@ -115,10 +116,10 @@ public:
         uint64_t limitGPUMemoryBytes;
     };
 
-    static PassOwnPtr<InspectorTimelineAgent> create(InspectorPageAgent* pageAgent, InspectorDOMAgent* domAgent, InspectorLayerTreeAgent* layerTreeAgent,
+    static PassOwnPtr<InspectorTimelineAgent> create(InspectorPageAgent* pageAgent, InspectorDOMAgent* domAgent, InspectorLayerTreeAgent* layerTreeAgent, InspectorTracingAgent* tracingAgent,
         InspectorOverlay* overlay, InspectorType type, InspectorClient* client)
     {
-        return adoptPtr(new InspectorTimelineAgent(pageAgent, domAgent, layerTreeAgent, overlay, type, client));
+        return adoptPtr(new InspectorTimelineAgent(pageAgent, domAgent, layerTreeAgent, tracingAgent, overlay, type, client));
     }
 
     virtual ~InspectorTimelineAgent();
@@ -127,7 +128,7 @@ public:
     virtual void clearFrontend() OVERRIDE;
     virtual void restore() OVERRIDE;
 
-    virtual void enable(ErrorString*, const String* traceEventCategoryFilter) OVERRIDE;
+    virtual void enable(ErrorString*) OVERRIDE;
     virtual void disable(ErrorString*) OVERRIDE;
     virtual void start(ErrorString*, const int* maxCallStackDepth, const bool* bufferEvents, const String* liveEvents, const bool* includeCounters, const bool* includeGPUEvents) OVERRIDE;
     virtual void stop(ErrorString*, RefPtr<TypeBuilder::Array<TypeBuilder::Timeline::TimelineEvent> >& events) OVERRIDE;
@@ -237,7 +238,7 @@ private:
 
     friend class TimelineRecordStack;
 
-    InspectorTimelineAgent(InspectorPageAgent*, InspectorDOMAgent*, InspectorLayerTreeAgent*, InspectorOverlay*, InspectorType, InspectorClient*);
+    InspectorTimelineAgent(InspectorPageAgent*, InspectorDOMAgent*, InspectorLayerTreeAgent*, InspectorTracingAgent*, InspectorOverlay*, InspectorType, InspectorClient*);
 
     // Trace event handlers
     void onBeginImplSideFrame(const TraceEventDispatcher::TraceEvent&);
@@ -296,6 +297,7 @@ private:
     InspectorPageAgent* m_pageAgent;
     InspectorDOMAgent* m_domAgent;
     InspectorLayerTreeAgent* m_layerTreeAgent;
+    InspectorTracingAgent* m_tracingAgent;
     InspectorFrontend::Timeline* m_frontend;
     InspectorClient* m_client;
     InspectorOverlay* m_overlay;
@@ -327,7 +329,6 @@ private:
     bool m_mayEmitFirstPaint;
     HashSet<String> m_liveEvents;
     double m_lastProgressTimestamp;
-    bool m_disableTracingOnStop;
 };
 
 } // namespace WebCore