[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..c00719969147a033e801f33d3bb691d0d959b80c 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -269,8 +269,7 @@ MaybeHandle<Code> CodeStub::GetCode(Isolate* isolate, uint32_t key) {
 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);
+    BinaryOpICStub stub(isolate, static_cast<Token::Value>(op), Strength::WEAK);
     stub.GetCode();
   }