Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/editing/commands/EditCommand.h

Index: third_party/WebKit/Source/core/editing/commands/EditCommand.h
diff --git a/third_party/WebKit/Source/core/editing/commands/EditCommand.h b/third_party/WebKit/Source/core/editing/commands/EditCommand.h
index 3e2bddbc90453e0fc9f9e73114f161b47a8995cd..a2f3ace9992d4ff86ed416f524a0ad1ea7aeaf2a 100644
--- a/third_party/WebKit/Source/core/editing/commands/EditCommand.h
+++ b/third_party/WebKit/Source/core/editing/commands/EditCommand.h
@@ -35,7 +35,7 @@ namespace blink {
 class CompositeEditCommand;
 class Document;
 
-class EditCommand : public RefCountedWillBeGarbageCollectedFinalized<EditCommand> {
+class EditCommand : public GarbageCollectedFinalized<EditCommand> {
 public:
     virtual ~EditCommand();
 
@@ -69,10 +69,10 @@ protected:
     static bool isRenderedCharacter(const Position&);
 
 private:
-    RefPtrWillBeMember<Document> m_document;
+    Member<Document> m_document;
     VisibleSelection m_startingSelection;
     VisibleSelection m_endingSelection;
-    RawPtrWillBeMember<CompositeEditCommand> m_parent;
+    Member<CompositeEditCommand> m_parent;
 };
 
 enum ShouldAssumeContentIsAlwaysEditable {