Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/build/scripts/templates/InternalSettingsGenerated.h.tmpl

 {% from "macros.tmpl" import license %}
 {{ license() }}
 
 #ifndef InternalSettingsGenerated_h
 #define InternalSettingsGenerated_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/RefCountedSupplement.h"
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Page;
 
-class InternalSettingsGenerated : public RefCountedWillBeGarbageCollectedFinalized<InternalSettingsGenerated>, public ScriptWrappable {
+class InternalSettingsGenerated : public GarbageCollectedFinalized<InternalSettingsGenerated>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     explicit InternalSettingsGenerated(Page*);
     virtual ~InternalSettingsGenerated();
     void resetToConsistentState();
     {% for setting in settings if setting.type|to_idl_type %}
     void set{{setting.name|upper_first}}({{setting.type|to_passing_type}} {{setting.name}});
     {% endfor %}
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    RawPtrWillBeMember<Page> m_page;
+    Member<Page> m_page;
 
     {% for setting in settings if setting.type|to_idl_type %}
     {{setting.type}} m_{{setting.name}};
     {% endfor %}
 };
 
 } // namespace blink
 
 #endif // InternalSettingsGenerated_h