VM: Simplify irregexp entry stub.

runtime/vm/regexp_assembler_ir.h

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_REGEXP_ASSEMBLER_IR_H_
 #define VM_REGEXP_ASSEMBLER_IR_H_
 
 #include "vm/assembler.h"
 #include "vm/intermediate_language.h"
 #include "vm/object.h"
@@ skipping 27 matching lines @@
   virtual bool CanReadUnaligned();
 
   // Compares two-byte strings case insensitively.
   // Called from generated RegExp code.
   static RawBool* CaseInsensitiveCompareUC16(
       RawString* str_raw,
       RawSmi* lhs_index_raw,
       RawSmi* rhs_index_raw,
       RawSmi* length_raw);
 
-  static RawArray* Execute(const Function& function,
+  static RawArray* Execute(const JSRegExp& regexp,
                            const String& input,
                            const Smi& start_offset,
                            Zone* zone);
 
   virtual bool IsClosed() const { return (current_instruction_ == NULL); }
 
   virtual intptr_t stack_limit_slack();
   virtual void AdvanceCurrentPosition(intptr_t by);
   virtual void AdvanceRegister(intptr_t reg, intptr_t by);
   virtual void Backtrack();
@@ skipping 375 matching lines @@
   IdAllocator temp_id_;
   IdAllocator arg_id_;
   IdAllocator local_id_;
   IdAllocator indirect_id_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_REGEXP_ASSEMBLER_IR_H_