Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/shadow/MediaControlsTest.cpp

 // 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.
 
 #include "core/html/shadow/MediaControls.h"
 
 #include "core/HTMLNames.h"
 #include "core/css/StylePropertySet.h"
 #include "core/dom/Document.h"
 #include "core/dom/ElementTraversal.h"
@@ skipping 59 matching lines @@
     void simulateRouteAvailabe()
     {
         m_mediaControls->mediaElement().remoteRouteAvailabilityChanged(true);
     }
 
     MediaControls& mediaControls() { return *m_mediaControls; }
     Document& document() { return m_pageHolder->document(); }
 
 private:
     OwnPtr<DummyPageHolder> m_pageHolder;
-    RawPtrWillBePersistent<MediaControls> m_mediaControls;
+    Persistent<MediaControls> m_mediaControls;
 };
 
 TEST_F(MediaControlsTest, HideAndShow)
 {
     mediaControls().mediaElement().setBooleanAttribute(HTMLNames::controlsAttr, true);
 
     Element* panel = getElementByShadowPseudoId(mediaControls(), "-webkit-media-controls-panel");
     ASSERT_NE(nullptr, panel);
 
     ASSERT_TRUE(isElementVisible(*panel));
@@ skipping 86 matching lines @@
     mediaControls().mediaElement().setBooleanAttribute(HTMLNames::disableremoteplaybackAttr, true);
     simulateRouteAvailabe();
     ASSERT_FALSE(isElementVisible(*castOverlayButton));
 
     mediaControls().mediaElement().setBooleanAttribute(HTMLNames::disableremoteplaybackAttr, false);
     mediaControls().reset();
     ASSERT_TRUE(isElementVisible(*castOverlayButton));
 }
 
 } // namespace blink