Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/canvas/CanvasFontCache.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 CanvasFontCache_h
 #define CanvasFontCache_h
 
 #include "core/CoreExport.h"
 #include "core/css/StylePropertySet.h"
 #include "platform/fonts/Font.h"
@@ skipping 32 matching lines @@
     void willProcessTask() override { }
 
     // For testing
     bool isInCache(const String&);
 
     ~CanvasFontCache();
 
 private:
     explicit CanvasFontCache(Document&);
     void schedulePruningIfNeeded();
-    typedef WillBeHeapHashMap<String, RefPtrWillBeMember<MutableStylePropertySet>> MutableStylePropertyMap;
+    typedef HeapHashMap<String, Member<MutableStylePropertySet>> MutableStylePropertyMap;
 
     HashMap<String, Font> m_fontsResolvedUsingDefaultStyle;
     MutableStylePropertyMap m_fetchedFonts;
     ListHashSet<String> m_fontLRUList;
     OwnPtr<FontCachePurgePreventer> m_mainCachePurgePreventer;
-    RawPtrWillBeMember<Document> m_document;
+    Member<Document> m_document;
     RefPtr<ComputedStyle> m_defaultFontStyle;
     bool m_pruningScheduled;
 };
 
 } // namespace blink
 
 #endif