[strong] Refactor ObjectStrength into a replacement for strong boolean args

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 5fb6f262900c464cd01ccbe084cfabe6c8c414cc..7614b7ff2a976c56333cc474388b9ce40aac8486 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -270,7 +270,7 @@ void BinaryOpICStub::GenerateAheadOfTime(Isolate* isolate) {
   // Generate the uninitialized versions of the stub.
   for (int op = Token::BIT_OR; op <= Token::MOD; ++op) {
     BinaryOpICStub stub(isolate, static_cast<Token::Value>(op),
-                        LanguageMode::SLOPPY);
+                        Strength::NORMAL);
     stub.GetCode();
   }