Fix invalid ASSERT() in HasStableMapValue().

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include "v8.h"
 
 #include "allocation.h"
@@ skipping 3599 matching lines @@
   bool BooleanValue() const { return boolean_value_; }
   bool IsUndetectable() const { return is_undetectable_; }
   InstanceType GetInstanceType() const { return instance_type_; }
 
   bool HasMapValue() const { return instance_type_ == MAP_TYPE; }
   Unique<Map> MapValue() const {
     ASSERT(HasMapValue());
     return Unique<Map>::cast(GetUnique());
   }
   bool HasStableMapValue() const {
-    ASSERT(HasMapValue());
+    ASSERT(HasMapValue() || !has_stable_map_value_);
     return has_stable_map_value_;
   }
 
   bool HasObjectMap() const { return !object_map_.IsNull(); }
   Unique<Map> ObjectMap() const {
     ASSERT(HasObjectMap());
     return object_map_;
   }
 
   virtual intptr_t Hashcode() V8_OVERRIDE {
@@ skipping 4001 matching lines @@
   virtual bool IsDeletable() const V8_OVERRIDE { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_