Oilpan: move WorkerGlobalScope to oilpan's heap.

Source/core/workers/WorkerGlobalScope.cpp

Index: Source/core/workers/WorkerGlobalScope.cpp
diff --git a/Source/core/workers/WorkerGlobalScope.cpp b/Source/core/workers/WorkerGlobalScope.cpp
index a517c8704513d3fd0cbcb0632728b7eb664c560b..c52477d44365b678317c4a5f12afc34167a96601 100644
--- a/Source/core/workers/WorkerGlobalScope.cpp
+++ b/Source/core/workers/WorkerGlobalScope.cpp
@@ -92,12 +92,6 @@ WorkerGlobalScope::WorkerGlobalScope(const KURL& url, const String& userAgent, W
 
 WorkerGlobalScope::~WorkerGlobalScope()
 {
-    ASSERT(thread()->isCurrentThread());
-
-    // Notify proxy that we are going away. This can free the WorkerThread object, so do not access it after this.
-    thread()->workerReportingProxy().workerGlobalScopeDestroyed();
-
-    setClient(0);
 }
 
 void WorkerGlobalScope::applyContentSecurityPolicyFromString(const String& policy, ContentSecurityPolicy::HeaderType contentSecurityPolicyType)
@@ -189,6 +183,20 @@ void WorkerGlobalScope::clearInspector()
     m_workerInspectorController.clear();
 }
 
+void WorkerGlobalScope::detach()
+{
+    ASSERT(thread()->isCurrentThread());
+
+    // Notify proxy that we are going away. This can free the WorkerThread object, so do not access it after this.
+    thread()->workerReportingProxy().workerGlobalScopeDestroyed();
+
+    clearScript();
+    clearInspector();
+    setClient(0);
+    // NOTE: the thread reference isn't cleared, as the execution context's
+    // thread is accessed by other GCed objects being finalized/destructed.
+}
+
 void WorkerGlobalScope::importScripts(const Vector<String>& urls, ExceptionState& exceptionState)
 {
     ASSERT(contentSecurityPolicy());
@@ -280,4 +288,12 @@ WorkerEventQueue* WorkerGlobalScope::eventQueue() const
     return m_eventQueue.get();
 }
 
+void WorkerGlobalScope::trace(Visitor* visitor)
+{
+    visitor->trace(m_console);
+    visitor->trace(m_location);
+    visitor->trace(m_navigator);
+    WillBeHeapSupplementable<WorkerGlobalScope>::trace(visitor);
+}
+
 } // namespace WebCore