Fix test failures of IDBTransactionTest.EnsureLifetime with ENABLE(OILPAN)

Source/bindings/v8/ScriptState.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "bindings/v8/ScriptState.h"
 
 #include "bindings/v8/V8Binding.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 51 matching lines @@
     v8::Local<v8::Value> v8Value = context()->Global()->Get(v8AtomicString(isolate(), name));
     return ScriptValue(this, v8Value);
 }
 
 ExecutionContext* ScriptState::executionContext() const
 {
     v8::HandleScope scope(m_isolate);
     return toExecutionContext(context());
 }
 
-void ScriptState::setExecutionContext(PassRefPtr<ExecutionContext>)
+void ScriptState::setExecutionContext(ExecutionContext*)
 {
     ASSERT_NOT_REACHED();
 }
 
 DOMWindow* ScriptState::domWindow() const
 {
     v8::HandleScope scope(m_isolate);
     return toDOMWindow(context());
 }
 
@@ skipping 13 matching lines @@
     return scriptState;
 }
 
 ScriptStateForTesting::ScriptStateForTesting(v8::Handle<v8::Context> context, PassRefPtr<DOMWrapperWorld> world)
     : ScriptState(context, world)
 {
 }
 
 ExecutionContext* ScriptStateForTesting::executionContext() const
 {
-    return m_executionContext.get();
+    return m_executionContext;
 }
 
-void ScriptStateForTesting::setExecutionContext(PassRefPtr<ExecutionContext> executionContext)
+void ScriptStateForTesting::setExecutionContext(ExecutionContext* executionContext)
 {
     m_executionContext = executionContext;
 }
 
 }