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 d0f3064a5060c908f073f80a5992341dbbdd197d..98b2e8acb527b59722de1a5f6062336dc7414854 100644
--- a/Source/core/workers/WorkerGlobalScope.cpp
+++ b/Source/core/workers/WorkerGlobalScope.cpp
@@ -93,12 +93,9 @@ 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);
+#if !ENABLE(OILPAN)
+    dispose();
+#endif
 }
 
 void WorkerGlobalScope::applyContentSecurityPolicyFromString(const String& policy, ContentSecurityPolicyHeaderType contentSecurityPolicyType)
@@ -190,6 +187,24 @@ void WorkerGlobalScope::clearInspector()
     m_workerInspectorController.clear();
 }
 
+void WorkerGlobalScope::dispose()
+{
+    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);
+
+    // The thread reference isn't currently cleared, as the execution
+    // context's thread is accessed by GCed lifetime objects when
+    // they're finalized.
+    // FIXME: oilpan: avoid by explicitly removing the WorkerGlobalScope
+    // as an observable context right here.
+}
+
 void WorkerGlobalScope::importScripts(const Vector<String>& urls, ExceptionState& exceptionState)
 {
     ASSERT(contentSecurityPolicy());
@@ -281,4 +296,12 @@ 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