Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/canvas/CanvasFontCacheTest.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/html/canvas/CanvasFontCache.h"
 
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
@@ skipping 13 matching lines @@
     void SetUp() override;
 
     DummyPageHolder& page() const { return *m_dummyPageHolder; }
     HTMLDocument& document() const { return *m_document; }
     HTMLCanvasElement& canvasElement() const { return *m_canvasElement; }
     CanvasRenderingContext* context2d() const;
     CanvasFontCache* cache() { return m_document->canvasFontCache(); }
 
 private:
     OwnPtr<DummyPageHolder> m_dummyPageHolder;
-    RefPtrWillBePersistent<HTMLDocument> m_document;
-    RefPtrWillBePersistent<HTMLCanvasElement> m_canvasElement;
+    Persistent<HTMLDocument> m_document;
+    Persistent<HTMLCanvasElement> m_canvasElement;
 };
 
 CanvasFontCacheTest::CanvasFontCacheTest()
 { }
 
 CanvasRenderingContext* CanvasFontCacheTest::context2d() const
 {
     // If the following check fails, perhaps you forgot to call createContext
     // in your test?
     EXPECT_NE(nullptr, canvasElement().renderingContext());
@@ skipping 49 matching lines @@
     EXPECT_FALSE(cache()->isInCache("15px sans-serif"));
 
     page().page().setVisibilityState(PageVisibilityStateVisible, false);
     context2d()->setFont("15px sans-serif");
     context2d()->setFont("10px sans-serif");
     EXPECT_TRUE(cache()->isInCache("10px sans-serif"));
     EXPECT_TRUE(cache()->isInCache("15px sans-serif"));
 }
 
 } // namespace blink