DevTools: Show GPU utilization bar on timeline

Source/core/inspector/InspectorInstrumentation.cpp

Index: Source/core/inspector/InspectorInstrumentation.cpp
diff --git a/Source/core/inspector/InspectorInstrumentation.cpp b/Source/core/inspector/InspectorInstrumentation.cpp
index b2685f88d43dcf6d337034ac9abbf5aacb98ed8f..ede00f4eb5c8a3fa8a32de0e622de45d01a79c6f 100644
--- a/Source/core/inspector/InspectorInstrumentation.cpp
+++ b/Source/core/inspector/InspectorInstrumentation.cpp
@@ -244,6 +244,7 @@ const char Paint[] = "Paint";
 const char Layer[] = "Layer";
 const char BeginFrame[] = "BeginFrame";
 const char UpdateLayer[] = "UpdateLayer";
+const char GPUTask[] = "GPUTask";
 };
 
 namespace InstrumentationEventArguments {
@@ -252,6 +253,7 @@ const char LayerTreeId[] = "layerTreeId";
 const char NodeId[] = "nodeId";
 const char PageId[] = "pageId";
 const char PixelRefId[] = "pixelRefId";
+const char OwnerPId[] = "ownerPId";
 };
 
 InstrumentingAgents* instrumentationForPage(Page* page)