One Zone per CompilationInfo.

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
index e670b442b6d5033c4734d307a3cc74c9d094d537..dfe6264520f90cf7605742bda3b5c3f78bc79df9 100644
--- a/src/liveedit.cc
+++ b/src/liveedit.cc
@@ -601,7 +601,9 @@ static void CompileScriptForTracker(Isolate* isolate, Handle<Script> script) {
   PostponeInterruptsScope postpone(isolate);
 
   // Build AST.
-  CompilationInfo info(script);
+  Zone zone(isolate);
+  CompilationInfo info(script, &zone);
+  ZoneScope scope(&zone, DELETE_ON_EXIT);
   info.MarkAsGlobal();
   // Parse and don't allow skipping lazy functions.
   if (ParserApi::Parse(&info, kNoParsingFlags)) {
@@ -894,7 +896,6 @@ class FunctionInfoListener {
 JSArray* LiveEdit::GatherCompileInfo(Handle<Script> script,
                                      Handle<String> source) {
   Isolate* isolate = Isolate::Current();
-  ZoneScope zone_scope(isolate, DELETE_ON_EXIT);
 
   FunctionInfoListener listener;
   Handle<Object> original_source = Handle<Object>(script->source());
@@ -993,10 +994,11 @@ static void ReplaceCodeObject(Code* original, Code* substitution) {
   HeapIterator iterator;
   AssertNoAllocation no_allocations_please;
 
+  Zone* zone = Isolate::Current()->runtime_zone();
   // A zone scope for ReferenceCollectorVisitor.
-  ZoneScope scope(Isolate::Current(), DELETE_ON_EXIT);
+  ZoneScope scope(zone, DELETE_ON_EXIT);
 
-  ReferenceCollectorVisitor visitor(original, Isolate::Current()->zone());
+  ReferenceCollectorVisitor visitor(original, zone);
 
   // Iterate over all roots. Stack frames may have pointer into original code,
   // so temporary replace the pointers with offset numbers
@@ -1602,7 +1604,7 @@ static const char* DropActivationsInActiveThread(
     Zone* zone) {
   Isolate* isolate = Isolate::Current();
   Debug* debug = isolate->debug();
-  ZoneScope scope(isolate, DELETE_ON_EXIT);
+  ZoneScope scope(zone, DELETE_ON_EXIT);
   Vector<StackFrame*> frames = CreateStackMap(zone);
 
   int array_len = Smi::cast(shared_info_array->length())->value();