One Zone per CompilationInfo.

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
index dac6aff156952cdc259f1a9aa17178cc4301ec9c..91a3bae1af7c072d9dd5c69e98e916e9b49762b9 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());
@@ -1594,7 +1595,7 @@ static const char* DropActivationsInActiveThreadImpl(
     TARGET& target, bool do_drop, 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);