Renamed "symbols" to "internalized strings" throughout the code base,

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index f837045eed037a9235d5cdac317dd84dde883421..ced5f52516fca9f42315dcaebdbcfcd8d692a23f 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -227,14 +227,14 @@ void CodeStubGraphBuilder<TransitionElementsKindStub>::BuildCodeStub() {
                     to_kind, array_length);
 
   AddInstruction(new(zone) HStoreNamedField(js_array,
-                                            factory->elements_field_symbol(),
+                                            factory->elements_field_string(),
                                             new_elements, true,
                                             JSArray::kElementsOffset));
   AddSimulate(BailoutId::StubEntry());
 
   if_builder.End();
 
-  AddInstruction(new(zone) HStoreNamedField(js_array, factory->length_symbol(),
+  AddInstruction(new(zone) HStoreNamedField(js_array, factory->length_string(),
                                             map, true, JSArray::kMapOffset));
   AddSimulate(BailoutId::StubEntry());