Move (uppercase) JS builtins from js builtins object to native context.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index f5f2eaeaad93e3d8960771a902afd80aa111bdad..d61f494afeaf98c03fbe1248fd78b383511ef9ac 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -6249,20 +6249,6 @@ int JSFunction::NumberOfLiterals() {
 }
 
 
-Object* JSBuiltinsObject::javascript_builtin(Builtins::JavaScript id) {
-  DCHECK(id < kJSBuiltinsCount);  // id is unsigned.
-  return READ_FIELD(this, OffsetOfFunctionWithId(id));
-}
-
-
-void JSBuiltinsObject::set_javascript_builtin(Builtins::JavaScript id,
-                                              Object* value) {
-  DCHECK(id < kJSBuiltinsCount);  // id is unsigned.
-  WRITE_FIELD(this, OffsetOfFunctionWithId(id), value);
-  WRITE_BARRIER(GetHeap(), this, OffsetOfFunctionWithId(id), value);
-}
-
-
 ACCESSORS(JSProxy, handler, Object, kHandlerOffset)
 ACCESSORS(JSProxy, hash, Object, kHashOffset)
 ACCESSORS(JSFunctionProxy, call_trap, Object, kCallTrapOffset)