Get rid of the ZoneScopeMode.

src/jsregexp.cc

 // 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 152 matching lines @@
 }
 
 
 // Generic RegExp methods. Dispatches to implementation specific methods.
 
 
 Handle<Object> RegExpImpl::Compile(Handle<JSRegExp> re,
                                    Handle<String> pattern,
                                    Handle<String> flag_str,
                                    Zone* zone) {
-  ZoneScope zone_scope(zone, DELETE_ON_EXIT);
+  ZoneScope zone_scope(zone);
   Isolate* isolate = re->GetIsolate();
   JSRegExp::Flags flags = RegExpFlagsFromString(flag_str);
   CompilationCache* compilation_cache = isolate->compilation_cache();
   Handle<FixedArray> cached = compilation_cache->LookupRegExp(pattern, flags);
   bool in_cache = !cached.is_null();
   LOG(isolate, RegExpCompileEvent(re, in_cache));
 
   Handle<Object> result;
   if (in_cache) {
     re->set_data(*cached);
@@ skipping 219 matching lines @@
   isolate->Throw(*regexp_err);
   return false;
 }
 
 
 bool RegExpImpl::CompileIrregexp(Handle<JSRegExp> re,
                                  Handle<String> sample_subject,
                                  bool is_ascii) {
   // Compile the RegExp.
   Isolate* isolate = re->GetIsolate();
-  ZoneScope zone_scope(isolate->runtime_zone(), DELETE_ON_EXIT);
+  ZoneScope zone_scope(isolate->runtime_zone());
   PostponeInterruptsScope postpone(isolate);
   // If we had a compilation error the last time this is saved at the
   // saved code index.
   Object* entry = re->DataAt(JSRegExp::code_index(is_ascii));
   // When arriving here entry can only be a smi, either representing an
   // uncompiled regexp, a previous compilation error, or code that has
   // been flushed.
   ASSERT(entry->IsSmi());
   int entry_value = Smi::cast(entry)->value();
   ASSERT(entry_value == JSRegExp::kUninitializedValue ||
@@ skipping 5699 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal