Reduce code duplication in IC updating.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3738 matching lines @@
   return ExtractExtendedExtraICStateFromFlags(flags());
 }
 
 
 Code::StubType Code::type() {
   return ExtractTypeFromFlags(flags());
 }
 
 
 int Code::arguments_count() {
-  ASSERT(is_call_stub() || is_keyed_call_stub() || kind() == STUB);
+  ASSERT(is_call_stub() || is_keyed_call_stub() ||
+         kind() == STUB || is_handler());
   return ExtractArgumentsCountFromFlags(flags());
 }
 
 
 inline bool Code::is_crankshafted() {
   return IsCrankshaftedField::decode(
       READ_UINT32_FIELD(this, kKindSpecificFlags2Offset));
 }
 
 
@@ skipping 2482 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_