Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/modules/fetch/DataConsumerHandleTestUtil.h

 // Copyright 2015 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.
 
 #ifndef DataConsumerHandleTestUtil_h
 #define DataConsumerHandleTestUtil_h
 
 #include "bindings/core/v8/ScriptState.h"
 #include "core/testing/NullExecutionContext.h"
 #include "gin/public/isolate_holder.h"
@@ skipping 54 matching lines @@
         ScriptState* getScriptState() { return m_scriptState.get(); }
         v8::Isolate* isolate() { return m_isolateHolder->isolate(); }
 
     private:
         void initialize();
         void shutdown();
 
         OwnPtr<WebThreadSupportingGC> m_thread;
         const InitializationPolicy m_initializationPolicy;
         OwnPtr<WaitableEvent> m_waitableEvent;
-        RefPtrWillBePersistent<NullExecutionContext> m_executionContext;
+        Persistent<NullExecutionContext> m_executionContext;
         OwnPtr<gin::IsolateHolder> m_isolateHolder;
         RefPtr<ScriptState> m_scriptState;
     };
 
     class ThreadingTestBase : public ThreadSafeRefCounted<ThreadingTestBase> {
     public:
         virtual ~ThreadingTestBase() { }
 
         class ThreadHolder;
 
@@ skipping 448 matching lines @@
         OwnPtr<HandleReadResult> m_result;
         bool m_isDone;
 
         OwnPtr<T> m_handleReader;
     };
 };
 
 } // namespace blink
 
 #endif // DataConsumerHandleTestUtil_h