Add a second kind of HandleScope that ties the lifetime of Handles created in its scope to the life…

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 1499277fb27a5c341c0f3d30741a50ec8a5d0a2e..e282a7f87c67fed74dba9b22b715ccb057e987c6 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -61,7 +61,8 @@ CompilationInfo::CompilationInfo(Handle<Script> script, Zone* zone)
       extension_(NULL),
       pre_parse_data_(NULL),
       osr_ast_id_(AstNode::kNoNumber),
-      zone_(zone) {
+      zone_(zone),
+      deferred_handles_(NULL) {
   Initialize(BASE);
 }
 
@@ -79,7 +80,8 @@ CompilationInfo::CompilationInfo(Handle<SharedFunctionInfo> shared_info,
       extension_(NULL),
       pre_parse_data_(NULL),
       osr_ast_id_(AstNode::kNoNumber),
-      zone_(zone) {
+      zone_(zone),
+      deferred_handles_(NULL) {
   Initialize(BASE);
 }
 
@@ -97,11 +99,17 @@ CompilationInfo::CompilationInfo(Handle<JSFunction> closure, Zone* zone)
       extension_(NULL),
       pre_parse_data_(NULL),
       osr_ast_id_(AstNode::kNoNumber),
-      zone_(zone) {
+      zone_(zone),
+      deferred_handles_(NULL) {
   Initialize(BASE);
 }
 
 
+CompilationInfo::~CompilationInfo() {
+  delete deferred_handles_;
+}
+
+
 // Disable optimization for the rest of the compilation pipeline.
 void CompilationInfo::DisableOptimization() {
   bool is_optimizable_closure =