Remove {FIRST,LAST}_SPEC_OBJECT_TYPE.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index e1cf7d808035bc4ac41a6187c2fdda76c7f60cc9..2778f1173b28dc33ad5eba7ed7c9612ffd40bc46 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -2079,7 +2079,7 @@ HValue* HGraphBuilder::BuildToObject(HValue* receiver) {
     // First check whether {receiver} is already a spec object (fast case).
     IfBuilder receiver_is_not_spec_object(this);
     receiver_is_not_spec_object.If<HCompareNumericAndBranch>(
-        receiver_instance_type, Add<HConstant>(FIRST_SPEC_OBJECT_TYPE),
+        receiver_instance_type, Add<HConstant>(FIRST_JS_RECEIVER_TYPE),
         Token::LT);
     receiver_is_not_spec_object.Then();
     {
@@ -4963,8 +4963,8 @@ void HOptimizedGraphBuilder::VisitReturnStatement(ReturnStatement* stmt) {
       HValue* receiver = environment()->arguments_environment()->Lookup(0);
       HHasInstanceTypeAndBranch* typecheck =
           New<HHasInstanceTypeAndBranch>(return_value,
-                                         FIRST_SPEC_OBJECT_TYPE,
-                                         LAST_SPEC_OBJECT_TYPE);
+                                         FIRST_JS_RECEIVER_TYPE,
+                                         LAST_JS_RECEIVER_TYPE);
       HBasicBlock* if_spec_object = graph()->CreateBasicBlock();
       HBasicBlock* not_spec_object = graph()->CreateBasicBlock();
       typecheck->SetSuccessorAt(0, if_spec_object);
@@ -12143,8 +12143,8 @@ void HOptimizedGraphBuilder::GenerateIsSpecObject(CallRuntime* call) {
   HValue* value = Pop();
   HHasInstanceTypeAndBranch* result =
       New<HHasInstanceTypeAndBranch>(value,
-                                     FIRST_SPEC_OBJECT_TYPE,
-                                     LAST_SPEC_OBJECT_TYPE);
+                                     FIRST_JS_RECEIVER_TYPE,
+                                     LAST_JS_RECEIVER_TYPE);
   return ast_context()->ReturnControl(result, call->id());
 }