Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/css/AffectedByFocusTest.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 "core/HTMLNames.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/NodeComputedStyle.h"
 #include "core/dom/StyleEngine.h"
 #include "core/frame/FrameView.h"
@@ skipping 18 matching lines @@
 
     HTMLDocument& document() const { return *m_document; }
 
     void setHtmlInnerHTML(const char* htmlContent);
 
     void checkElements(ElementResult expected[], unsigned expectedCount) const;
 
 private:
     OwnPtr<DummyPageHolder> m_dummyPageHolder;
 
-    RefPtrWillBePersistent<HTMLDocument> m_document;
+    Persistent<HTMLDocument> m_document;
 };
 
 void AffectedByFocusTest::SetUp()
 {
     m_dummyPageHolder = DummyPageHolder::create(IntSize(800, 600));
     m_document = toHTMLDocument(&m_dummyPageHolder->document());
     ASSERT(m_document);
 }
 
 void AffectedByFocusTest::setHtmlInnerHTML(const char* htmlContent)
@@ skipping 254 matching lines @@
 
     document().getElementById("d")->focus();
     document().view()->updateAllLifecyclePhases();
 
     unsigned elementCount = document().styleEngine().styleForElementCount() - startCount;
 
     ASSERT_EQ(1U, elementCount);
 }
 
 } // namespace blink