Revert "Move precompilation-related flags to flags list."

runtime/vm/regexp.cc

 // 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.
 
 #include "vm/regexp.h"
 
 #include "vm/dart_entry.h"
 #include "vm/regexp_assembler.h"
 #include "vm/regexp_assembler_bytecode.h"
 #include "vm/regexp_assembler_ir.h"
 #include "vm/regexp_ast.h"
 #include "vm/unibrow-inl.h"
 #include "vm/unicode.h"
 #include "vm/symbols.h"
 #include "vm/thread.h"
 
 #define Z (zone())
 
 namespace dart {
 
 DECLARE_FLAG(bool, trace_irregexp);
+DEFINE_FLAG(bool, interpret_irregexp, false,
+            "Use irregexp bytecode interpreter");
 
 // Default to generating optimized regexp code.
 static const bool kRegexpOptimization = true;
 
 // More makes code generation slower, less makes V8 benchmark score lower.
 static const intptr_t kMaxLookaheadForBoyerMoore = 8;
 
 ContainedInLattice AddRange(ContainedInLattice containment,
                             const intptr_t* ranges,
                             intptr_t ranges_length,
@@ skipping 5292 matching lines @@
   CreateSpecializedFunction(zone, regexp, kOneByteStringCid, owner);
   CreateSpecializedFunction(zone, regexp, kTwoByteStringCid, owner);
   CreateSpecializedFunction(zone, regexp, kExternalOneByteStringCid, owner);
   CreateSpecializedFunction(zone, regexp, kExternalTwoByteStringCid, owner);
 
   return regexp.raw();
 }
 
 
 }  // namespace dart