Get rid of the ZoneScopeMode.

src/runtime.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 3583 matching lines @@
 MUST_USE_RESULT static MaybeObject* StringReplaceGlobalAtomRegExpWithString(
     Isolate* isolate,
     Handle<String> subject,
     Handle<JSRegExp> pattern_regexp,
     Handle<String> replacement,
     Handle<JSArray> last_match_info) {
   ASSERT(subject->IsFlat());
   ASSERT(replacement->IsFlat());
 
   Zone* zone = isolate->runtime_zone();
-  ZoneScope zone_space(zone, DELETE_ON_EXIT);
+  ZoneScope zone_space(zone);
   ZoneList<int> indices(8, zone);
   ASSERT_EQ(JSRegExp::ATOM, pattern_regexp->TypeTag());
   String* pattern =
       String::cast(pattern_regexp->DataAt(JSRegExp::kAtomPatternIndex));
   int subject_len = subject->length();
   int pattern_len = pattern->length();
   int replacement_len = replacement->length();
 
   FindStringIndicesDispatch(
       isolate, *subject, pattern, &indices, 0xffffffff, zone);
@@ skipping 66 matching lines @@
     Handle<String> replacement,
     Handle<JSArray> last_match_info) {
   ASSERT(subject->IsFlat());
   ASSERT(replacement->IsFlat());
 
   int capture_count = regexp->CaptureCount();
   int subject_length = subject->length();
 
   // CompiledReplacement uses zone allocation.
   Zone* zone = isolate->runtime_zone();
-  ZoneScope zonescope(zone, DELETE_ON_EXIT);
+  ZoneScope zonescope(zone);
   CompiledReplacement compiled_replacement(zone);
   bool simple_replace = compiled_replacement.Compile(replacement,
                                                      capture_count,
                                                      subject_length);
 
   // Shortcut for simple non-regexp global replacements
   if (regexp->TypeTag() == JSRegExp::ATOM && simple_replace) {
     if (subject->HasOnlyOneByteChars() &&
         replacement->HasOnlyOneByteChars()) {
       return StringReplaceGlobalAtomRegExpWithString<SeqOneByteString>(
@@ skipping 514 matching lines @@
   CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSRegExp, regexp, 1);
   CONVERT_ARG_HANDLE_CHECKED(JSArray, regexp_info, 2);
 
   RegExpImpl::GlobalCache global_cache(regexp, subject, true, isolate);
   if (global_cache.HasException()) return Failure::Exception();
 
   int capture_count = regexp->CaptureCount();
 
   Zone* zone = isolate->runtime_zone();
-  ZoneScope zone_space(zone, DELETE_ON_EXIT);
+  ZoneScope zone_space(zone);
   ZoneList<int> offsets(8, zone);
 
   while (true) {
     int32_t* match = global_cache.FetchNext();
     if (match == NULL) break;
     offsets.Add(match[0], zone);  // start
     offsets.Add(match[1], zone);  // end
   }
 
   if (global_cache.HasException()) return Failure::Exception();
@@ skipping 2072 matching lines @@
 
   // The limit can be very large (0xffffffffu), but since the pattern
   // isn't empty, we can never create more parts than ~half the length
   // of the subject.
 
   if (!subject->IsFlat()) FlattenString(subject);
 
   static const int kMaxInitialListCapacity = 16;
 
   Zone* zone = isolate->runtime_zone();
-  ZoneScope scope(zone, DELETE_ON_EXIT);
+  ZoneScope scope(zone);
 
   // Find (up to limit) indices of separator and end-of-string in subject
   int initial_capacity = Min<uint32_t>(kMaxInitialListCapacity, limit);
   ZoneList<int> indices(initial_capacity, zone);
   if (!pattern->IsFlat()) FlattenString(pattern);
 
   FindStringIndicesDispatch(isolate, *subject, *pattern, &indices, limit, zone);
 
   if (static_cast<uint32_t>(indices.length()) < limit) {
     indices.Add(subject_length, zone);
@@ skipping 7593 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal