Timeline: do not rely on UpdateLayer & PaintLayer trace events

Source/core/inspector/InspectorInstrumentation.h

Index: Source/core/inspector/InspectorInstrumentation.h
diff --git a/Source/core/inspector/InspectorInstrumentation.h b/Source/core/inspector/InspectorInstrumentation.h
index 44df7d94df442c7ce2d68076186aa676cadf7903..2cb346660aa376bc24296a8f06838ac87958308c 100644
--- a/Source/core/inspector/InspectorInstrumentation.h
+++ b/Source/core/inspector/InspectorInstrumentation.h
@@ -123,18 +123,15 @@ InstrumentingAgents* instrumentingAgentsForNonDocumentContext(ExecutionContext*)
 
 namespace InstrumentationEvents {
 extern const char PaintSetup[];
-extern const char PaintLayer[];
 extern const char RasterTask[];
 extern const char Paint[];
 extern const char Layer[];
 extern const char BeginFrame[];
-extern const char UpdateLayer[];
 };
 
 namespace InstrumentationEventArguments {
 extern const char LayerId[];
 extern const char LayerTreeId[];
-extern const char NodeId[];
 extern const char PageId[];
 };