Add log compression ability.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 1c43f7a4ba2fd3501969bb2af03e9c3526b063f4..0648e54dc2f982b2bdac805f45fc8d96d65c89eb 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -720,7 +720,8 @@ void Builtins::Setup(bool create_heap_objects) {
       // bootstrapper.
       Bootstrapper::AddFixup(Code::cast(code), &masm);
       // Log the event and add the code to the builtins array.
-      LOG(CodeCreateEvent("Builtin", Code::cast(code), functions[i].s_name));
+      LOG(CodeCreateEvent(Logger::BUILTIN_TAG,
+                          Code::cast(code), functions[i].s_name));
       builtins_[i] = code;
 #ifdef ENABLE_DISASSEMBLER
       if (FLAG_print_builtin_code) {