Get rid of ZoneScope completely.

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 150 matching lines @@
   }
   return true;
 }
 
 
 // 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);
+                                   Handle<String> flag_str) {
   Isolate* isolate = re->GetIsolate();
+  Zone zone(isolate);
   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);
     return re;
   }
   pattern = FlattenGetString(pattern);
   PostponeInterruptsScope postpone(isolate);
   RegExpCompileData parse_result;
   FlatStringReader reader(isolate, pattern);
   if (!RegExpParser::ParseRegExp(&reader, flags.is_multiline(),
-                                 &parse_result, zone)) {
+                                 &parse_result, &zone)) {
     // Throw an exception if we fail to parse the pattern.
     ThrowRegExpException(re,
                          pattern,
                          parse_result.error,
                          "malformed_regexp");
     return Handle<Object>::null();
   }
 
   bool has_been_compiled = false;
 
@@ skipping 201 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);
+  Zone zone(isolate);
   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 10 matching lines @@
     CreateRegExpErrorObjectAndThrow(re, is_ascii, error_message, isolate);
     return false;
   }
 
   JSRegExp::Flags flags = re->GetFlags();
 
   Handle<String> pattern(re->Pattern());
   if (!pattern->IsFlat()) FlattenString(pattern);
   RegExpCompileData compile_data;
   FlatStringReader reader(isolate, pattern);
-  Zone* zone = isolate->runtime_zone();
   if (!RegExpParser::ParseRegExp(&reader, flags.is_multiline(),
                                  &compile_data,
-                                 zone)) {
+                                 &zone)) {
     // Throw an exception if we fail to parse the pattern.
     // THIS SHOULD NOT HAPPEN. We already pre-parsed it successfully once.
     ThrowRegExpException(re,
                          pattern,
                          compile_data.error,
                          "malformed_regexp");
     return false;
   }
   RegExpEngine::CompilationResult result =
       RegExpEngine::Compile(&compile_data,
                             flags.is_ignore_case(),
                             flags.is_global(),
                             flags.is_multiline(),
                             pattern,
                             sample_subject,
                             is_ascii,
-                            zone);
+                            &zone);
   if (result.error_message != NULL) {
     // Unable to compile regexp.
     Handle<String> error_message =
         isolate->factory()->NewStringFromUtf8(CStrVector(result.error_message));
     CreateRegExpErrorObjectAndThrow(re, is_ascii, error_message, isolate);
     return false;
   }
 
   Handle<FixedArray> data = Handle<FixedArray>(FixedArray::cast(re->data()));
   data->set(JSRegExp::code_index(is_ascii), result.code);
@@ skipping 5648 matching lines @@
   }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal