Add UMA to understand the typical total size of ServiceWorker script [1/2 blink]

Source/core/workers/WorkerGlobalScope.h

 /*
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 115 matching lines @@
     WorkerClients* clients() { return m_workerClients.get(); }
 
     using SecurityContext::securityOrigin;
     using SecurityContext::contentSecurityPolicy;
 
     virtual void addConsoleMessage(PassRefPtrWillBeRawPtr<ConsoleMessage>) override final;
     ConsoleMessageStorage* messageStorage();
 
     void exceptionHandled(int exceptionId, bool isHandled);
 
+    virtual void scriptLoaded(size_t scriptSize, size_t cachedMetadataSize) { }
+
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     WorkerGlobalScope(const KURL&, const String& userAgent, WorkerThread*, double timeOrigin, const SecurityOrigin*, PassOwnPtrWillBeRawPtr<WorkerClients>);
     void applyContentSecurityPolicyFromString(const String& contentSecurityPolicy, ContentSecurityPolicyHeaderType);
 
     virtual void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) override;
     void addMessageToWorkerConsole(PassRefPtrWillBeRawPtr<ConsoleMessage>);
     void setV8CacheOptions(V8CacheOptions v8CacheOptions) { m_v8CacheOptions = v8CacheOptions; }
 
@@ skipping 43 matching lines @@
 
     unsigned long m_workerExceptionUniqueIdentifier;
     WillBeHeapHashMap<unsigned long, RefPtrWillBeMember<ConsoleMessage>> m_pendingMessages;
 };
 
 DEFINE_TYPE_CASTS(WorkerGlobalScope, ExecutionContext, context, context->isWorkerGlobalScope(), context.isWorkerGlobalScope());
 
 } // namespace blink
 
 #endif // WorkerGlobalScope_h