DevTools: added support for image url & node in tracing-based timeline

Source/core/inspector/InspectorTraceEvents.h

Index: Source/core/inspector/InspectorTraceEvents.h
diff --git a/Source/core/inspector/InspectorTraceEvents.h b/Source/core/inspector/InspectorTraceEvents.h
index 205ba9f4d2376288d717df5cbf7e9021c7af77c0..a977b2732ba1562978085ac7eee1e7994cb9c764 100644
--- a/Source/core/inspector/InspectorTraceEvents.h
+++ b/Source/core/inspector/InspectorTraceEvents.h
@@ -20,6 +20,7 @@ class KURL;
 class LayoutRect;
 class LocalFrame;
 class RenderObject;
+class RenderImage;
 class ResourceRequest;
 class ResourceResponse;
 class ScriptSourceCode;
@@ -102,6 +103,11 @@ public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(RenderObject*, const LayoutRect& clipRect, const GraphicsLayer*);
 };
 
+class InspectorPaintImageEvent {
+public:
+    static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(const RenderImage&);
+};
+
 class InspectorMarkLoadEvent {
 public:
     static PassRefPtr<TraceEvent::ConvertableToTraceFormat> data(LocalFrame*);