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

src/x87/lithium-codegen-x87.cc

Index: src/x87/lithium-codegen-x87.cc
diff --git a/src/x87/lithium-codegen-x87.cc b/src/x87/lithium-codegen-x87.cc
index d10af1ff3681f6998041a6e560deb342f61e01c7..58925cd1cf4c1398e0e96e866723961c2b176d9c 100644
--- a/src/x87/lithium-codegen-x87.cc
+++ b/src/x87/lithium-codegen-x87.cc
@@ -2340,8 +2340,8 @@ void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
   DCHECK(ToRegister(instr->right()).is(eax));
   DCHECK(ToRegister(instr->result()).is(eax));
 
-  Handle<Code> code = CodeFactory::BinaryOpIC(
-      isolate(), instr->op(), instr->language_mode()).code();
+  Handle<Code> code =
+      CodeFactory::BinaryOpIC(isolate(), instr->op(), instr->strength()).code();
   CallCode(code, RelocInfo::CODE_TARGET, instr);
 }
 
@@ -2773,7 +2773,8 @@ static Condition ComputeCompareCondition(Token::Value op) {
 void LCodeGen::DoStringCompareAndBranch(LStringCompareAndBranch* instr) {
   Token::Value op = instr->op();
 
-  Handle<Code> ic = CodeFactory::CompareIC(isolate(), op, SLOPPY).code();
+  Handle<Code> ic =
+      CodeFactory::CompareIC(isolate(), op, Strength::WEAK).code();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 
   Condition condition = ComputeCompareCondition(op);
@@ -3046,7 +3047,7 @@ void LCodeGen::DoCmpT(LCmpT* instr) {
   Token::Value op = instr->op();
 
   Handle<Code> ic =
-      CodeFactory::CompareIC(isolate(), op, instr->language_mode()).code();
+      CodeFactory::CompareIC(isolate(), op, instr->strength()).code();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 
   Condition condition = ComputeCompareCondition(op);