Worker: Notify WorkerThread lifecycle events via WorkerReportingProxy

third_party/WebKit/Source/core/workers/WorkerReportingProxy.h

Index: third_party/WebKit/Source/core/workers/WorkerReportingProxy.h
diff --git a/third_party/WebKit/Source/core/workers/WorkerReportingProxy.h b/third_party/WebKit/Source/core/workers/WorkerReportingProxy.h
index 166163e6203501fdebb3abb2525a215b179c0d6e..46895eb2fe0f0b1bcb85872b02063a5054ae5a76 100644
--- a/third_party/WebKit/Source/core/workers/WorkerReportingProxy.h
+++ b/third_party/WebKit/Source/core/workers/WorkerReportingProxy.h
@@ -52,6 +52,9 @@ public:
     virtual void reportConsoleMessage(MessageSource, MessageLevel, const String& message, SourceLocation*) = 0;
     virtual void postMessageToPageInspector(const String&) = 0;
 
+    // Invoked when the worker script or imported script is loaded.
+    virtual void didLoadWorkerScript(size_t scriptSize, size_t cachedMetadataSize) { }
+
     // Invoked when the worker script is evaluated. |success| is true if the
     // evaluation completed with no uncaught exception.
     virtual void didEvaluateWorkerScript(bool success) = 0;
@@ -60,7 +63,7 @@ public:
     virtual void didInitializeWorkerContext() { }
 
     // Invoked when the new WorkerGlobalScope is started.
-    virtual void workerGlobalScopeStarted(WorkerOrWorkletGlobalScope*) = 0;
+    virtual void workerGlobalScopeStarted(WorkerOrWorkletGlobalScope*) { }
 
     // Invoked when close() is invoked on the worker context.
     virtual void workerGlobalScopeClosed() = 0;