Expose performance.memory in workers

Source/core/workers/WorkerGlobalScope.h

Index: Source/core/workers/WorkerGlobalScope.h
diff --git a/Source/core/workers/WorkerGlobalScope.h b/Source/core/workers/WorkerGlobalScope.h
index 08fa1eecff804fb68e2b4c8481108145d02669cd..963d7633f0ba8ba5f87ee10f9e37224b1c56db6a 100644
--- a/Source/core/workers/WorkerGlobalScope.h
+++ b/Source/core/workers/WorkerGlobalScope.h
@@ -36,6 +36,7 @@
 #include "core/frame/ContentSecurityPolicy.h"
 #include "core/workers/WorkerConsole.h"
 #include "core/workers/WorkerEventQueue.h"
+#include "core/workers/WorkerSettings.h"
 #include "core/workers/WorkerSupplementable.h"
 #include "wtf/Assertions.h"
 #include "wtf/HashMap.h"
@@ -135,13 +136,15 @@ namespace WebCore {
 
         double timeOrigin() const { return m_timeOrigin; }
 
+        WorkerSettings* settings() const { return m_workerSettings.get(); }
+
         WorkerClients* clients() { return m_workerClients.get(); }
 
         using SecurityContext::securityOrigin;
         using SecurityContext::contentSecurityPolicy;
 
     protected:
-        WorkerGlobalScope(const KURL&, const String& userAgent, WorkerThread*, double timeOrigin, PassOwnPtr<WorkerClients>);
+        WorkerGlobalScope(const KURL&, const String& userAgent, WorkerThread*, double timeOrigin, PassOwnPtr<WorkerClients>, PassOwnPtr<WorkerSettings>);
         void applyContentSecurityPolicyFromString(const String& contentSecurityPolicy, ContentSecurityPolicy::HeaderType);
 
         virtual void logExceptionToConsole(const String& errorMessage, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtr<ScriptCallStack>) OVERRIDE;
@@ -181,6 +184,7 @@ namespace WebCore {
         OwnPtr<WorkerClients> m_workerClients;
 
         double m_timeOrigin;
+        OwnPtr<WorkerSettings> m_workerSettings;
     };
 
 DEFINE_TYPE_CASTS(WorkerGlobalScope, ExecutionContext, context, context->isWorkerGlobalScope(), context.isWorkerGlobalScope());