Get rid of JSArray::Expand and friends

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index e417e32582a662be111d28aaf5af2bfd8944fd27..26bae06855405b91f7b9fc70d03a76445b9bf496 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -10200,16 +10200,6 @@ class JSArray: public JSObject {
 
   DECLARE_CAST(JSArray)
 
-  // Ensures that the fixed array backing the JSArray has at
-  // least the stated size.
-  static inline void EnsureSize(Handle<JSArray> array,
-                                int minimum_size_of_backing_fixed_array);
-
-  // Expand the fixed array backing of a fast-case JSArray to at least
-  // the requested size.
-  static void Expand(Handle<JSArray> array,
-                     int minimum_size_of_backing_fixed_array);
-
   // Dispatched behavior.
   DECLARE_PRINTER(JSArray)
   DECLARE_VERIFIER(JSArray)