ScriptState::contextIsEmpty shouldn't return true for a context whose global object is detached

Source/bindings/core/v8/ScheduledAction.cpp

Index: Source/bindings/core/v8/ScheduledAction.cpp
diff --git a/Source/bindings/core/v8/ScheduledAction.cpp b/Source/bindings/core/v8/ScheduledAction.cpp
index b0315ae806413692cd7657f28bab68feba0427c7..28bfe26e508f267a36168bae57fc6ef0d160388d 100644
--- a/Source/bindings/core/v8/ScheduledAction.cpp
+++ b/Source/bindings/core/v8/ScheduledAction.cpp
@@ -83,7 +83,7 @@ void ScheduledAction::execute(ExecutionContext* context)
 
 void ScheduledAction::execute(LocalFrame* frame)
 {
-    if (m_scriptState->contextIsEmpty())
+    if (m_scriptState->contextIsValue())
         return;
 
     TRACE_EVENT0("v8", "ScheduledAction::execute");
@@ -102,7 +102,7 @@ void ScheduledAction::execute(LocalFrame* frame)
 void ScheduledAction::execute(WorkerGlobalScope* worker)
 {
     ASSERT(worker->thread()->isCurrentThread());
-    ASSERT(!m_scriptState->contextIsEmpty());
+    ASSERT(!m_scriptState->contextIsValue());
     if (!m_function.isEmpty()) {
         ScriptState::Scope scope(m_scriptState.get());
         Vector<v8::Handle<v8::Value> > info;