X87: Remove CallFunctionStub, always call through the Call builtin (also from CallIC).

src/crankshaft/x87/lithium-codegen-x87.cc

Index: src/crankshaft/x87/lithium-codegen-x87.cc
diff --git a/src/crankshaft/x87/lithium-codegen-x87.cc b/src/crankshaft/x87/lithium-codegen-x87.cc
index 28120d3293ffe9a643f9dd39695aebfcd49baec3..0507d9390ddb86bbd69e1ca19fe7263fc3da32fa 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -4181,7 +4181,6 @@ void LCodeGen::DoCallFunction(LCallFunction* instr) {
   DCHECK(ToRegister(instr->result()).is(eax));
 
   int arity = instr->arity();
-  CallFunctionFlags flags = instr->hydrogen()->function_flags();
   if (instr->hydrogen()->HasVectorAndSlot()) {
     Register slot_register = ToRegister(instr->temp_slot());
     Register vector_register = ToRegister(instr->temp_vector());
@@ -4195,15 +4194,12 @@ void LCodeGen::DoCallFunction(LCallFunction* instr) {
     __ mov(vector_register, vector);
     __ mov(slot_register, Immediate(Smi::FromInt(index)));
 
-    CallICState::CallType call_type =
-        (flags & CALL_AS_METHOD) ? CallICState::METHOD : CallICState::FUNCTION;
-
     Handle<Code> ic =
-        CodeFactory::CallICInOptimizedCode(isolate(), arity, call_type).code();
+        CodeFactory::CallICInOptimizedCode(isolate(), arity).code();
     CallCode(ic, RelocInfo::CODE_TARGET, instr);
   } else {
-    CallFunctionStub stub(isolate(), arity, flags);
-    CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+    __ Set(eax, arity);
+    CallCode(isolate()->builtins()->Call(), RelocInfo::CODE_TARGET, instr);
   }
 }