Valgrind cleanliness, part 5: Delete extensions on exit.

src/extensions/gc-extension.cc

Index: src/extensions/gc-extension.cc
diff --git a/src/extensions/gc-extension.cc b/src/extensions/gc-extension.cc
index 573797e174aae23ba2ee800e972fd8fa5835c4a0..f921552aaaa7fa2c3156cb35c5904bfbe1d7f9fc 100644
--- a/src/extensions/gc-extension.cc
+++ b/src/extensions/gc-extension.cc
@@ -46,9 +46,8 @@ v8::Handle<v8::Value> GCExtension::GC(const v8::Arguments& args) {
 
 
 void GCExtension::Register() {
-  static GCExtension* gc_extension = NULL;
-  if (gc_extension == NULL) gc_extension = new GCExtension();
-  static v8::DeclareExtension gc_extension_declaration(gc_extension);
+  static GCExtension gc_extension;
+  static v8::DeclareExtension declaration(&gc_extension);
 }
 
 } }  // namespace v8::internal