Rename IS_SPEC_OBJECT to IS_JS_RECEIVER in hydrogen.

src/crankshaft/hydrogen-instructions.h

Index: src/crankshaft/hydrogen-instructions.h
diff --git a/src/crankshaft/hydrogen-instructions.h b/src/crankshaft/hydrogen-instructions.h
index d4026918f3ac256598a663497d8fc645b8322604..b69a9b8ea5ae9882f1dcc7edec30776530294604 100644
--- a/src/crankshaft/hydrogen-instructions.h
+++ b/src/crankshaft/hydrogen-instructions.h
@@ -2862,7 +2862,7 @@ class HCheckValue final : public HUnaryOperation {
 class HCheckInstanceType final : public HUnaryOperation {
  public:
   enum Check {
-    IS_SPEC_OBJECT,
+    IS_JS_RECEIVER,
     IS_JS_ARRAY,
     IS_JS_DATE,
     IS_STRING,
@@ -2880,10 +2880,9 @@ class HCheckInstanceType final : public HUnaryOperation {
 
   HType CalculateInferredType() override {
     switch (check_) {
-      case IS_SPEC_OBJECT: return HType::JSObject();
+      case IS_JS_RECEIVER: return HType::JSObject();
       case IS_JS_ARRAY: return HType::JSArray();
-      case IS_JS_DATE:
-        return HType::JSObject();
+      case IS_JS_DATE: return HType::JSObject();
       case IS_STRING: return HType::String();
       case IS_INTERNALIZED_STRING: return HType::String();
     }