Get rid of ZoneScope completely.

src/compiler.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 528 matching lines @@
 
 static bool DebuggerWantsEagerCompilation(CompilationInfo* info,
                                           bool allow_lazy_without_ctx = false) {
   return LiveEditFunctionTracker::IsActive(info->isolate()) ||
          (info->isolate()->DebuggerHasBreakPoints() && !allow_lazy_without_ctx);
 }
 
 
 static Handle<SharedFunctionInfo> MakeFunctionInfo(CompilationInfo* info) {
   Isolate* isolate = info->isolate();
-  ZoneScope zone_scope(info->zone(), DELETE_ON_EXIT);
   PostponeInterruptsScope postpone(isolate);
 
   ASSERT(!isolate->native_context().is_null());
   Handle<Script> script = info->script();
   // TODO(svenpanne) Obscure place for this, perhaps move to OnBeforeCompile?
   FixedArray* array = isolate->native_context()->embedder_data();
   script->set_context_data(array->get(0));
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (info->is_eval()) {
@@ skipping 343 matching lines @@
       return true;
     }
   }
   return false;
 }
 
 
 bool Compiler::CompileLazy(CompilationInfo* info) {
   Isolate* isolate = info->isolate();
 
-  ZoneScope zone_scope(info->zone(), DELETE_ON_EXIT);
-
   // The VM is in the COMPILER state until exiting this function.
   VMState<COMPILER> state(isolate);
 
   PostponeInterruptsScope postpone(isolate);
 
   Handle<SharedFunctionInfo> shared = info->shared_info();
   int compiled_size = shared->end_position() - shared->start_position();
   isolate->counters()->total_compile_size()->Increment(compiled_size);
 
   if (InstallCodeFromOptimizedCodeMap(info)) return true;
@@ skipping 296 matching lines @@
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 
 CompilationPhase::CompilationPhase(const char* name,
                                    Isolate* isolate,
                                    Zone* zone)
-    : name_(name), isolate_(isolate), zone_scope_(zone, DELETE_ON_EXIT) {
+    : name_(name), isolate_(isolate), zone_(zone) {
   if (FLAG_hydrogen_stats) {
     start_allocation_size_ = zone->allocation_size();
     start_ticks_ = OS::Ticks();
   }
 }
 
 
 CompilationPhase::~CompilationPhase() {
   if (FLAG_hydrogen_stats) {
     unsigned size = zone()->allocation_size() - start_allocation_size_;
     int64_t ticks = OS::Ticks() - start_ticks_;
     isolate_->GetHStatistics()->SaveTiming(name_, ticks, size);
   }
 }
 
 
 bool CompilationPhase::ShouldProduceTraceOutput() const {
   // Produce trace output if flag is set so that the first letter of the
   // phase name matches the command line parameter FLAG_trace_phase.
   return (FLAG_trace_hydrogen &&
           OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal