[Do not submit] Worklet implementation.

third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp

Index: third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
diff --git a/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp b/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
index d5776efe28175ffc7047b5f08ffbfa35a2271953..f2f502d86691e60a4e4808bf8faa9fc84f36aa48 100644
--- a/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
+++ b/third_party/WebKit/Source/core/workers/WorkerGlobalScope.cpp
@@ -118,6 +118,11 @@ ExecutionContext* WorkerGlobalScope::executionContext() const
     return const_cast<WorkerGlobalScope*>(this);
 }
 
+v8::Isolate* WorkerGlobalScope::isolate() const
+{
+    return thread()->isolate();
+}
+
 const KURL& WorkerGlobalScope::virtualURL() const
 {
     return m_url;
@@ -424,9 +429,8 @@ DEFINE_TRACE(WorkerGlobalScope)
     visitor->trace(m_eventListeners);
     HeapSupplementable<WorkerGlobalScope>::trace(visitor);
 #endif
-    ExecutionContext::trace(visitor);
+    AbstractGlobalScope::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
-    SecurityContext::trace(visitor);
 }
 
 } // namespace blink