Replace CallClosureTask::create(bind()) with createCrossThreadTask()

Source/core/dom/ExecutionContext.cpp

Index: Source/core/dom/ExecutionContext.cpp
diff --git a/Source/core/dom/ExecutionContext.cpp b/Source/core/dom/ExecutionContext.cpp
index 44feb8adc754143d88e59ef1c419ddfce1d41fec..a542cf32d8c6797830cb5cd772ccbaed403d2d8d 100644
--- a/Source/core/dom/ExecutionContext.cpp
+++ b/Source/core/dom/ExecutionContext.cpp
@@ -303,13 +303,6 @@ void ExecutionContext::postTask(PassOwnPtr<ExecutionContextTask> task)
     m_client->postTask(task);
 }
 
-void ExecutionContext::postTask(const Closure& closure)
-{
-    if (!m_client)
-        return;
-    m_client->postTask(CallClosureTask::create(closure));
-}
-
 PassOwnPtr<LifecycleNotifier<ExecutionContext> > ExecutionContext::createLifecycleNotifier()
 {
     return ContextLifecycleNotifier::create(this);