Add OnCompileError handler and v8::CompileError debug event

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index bc7646bd4834bafc03bf333f53da14ee072ac451..5e1fbb616142a94aef0a6293240a6c1308e493f9 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -1185,6 +1185,8 @@ class Isolate {
   // Traverse prototype chain to find out whether the object is derived from
   // the Error object.
   bool IsErrorObject(Handle<Object> obj);
+  bool IsSyntaxErrorObject(Handle<Object> obj);
+  bool IsTypeObject(Handle<Object> obj, Handle<String> key);
 
   Atomic32 id_;
   EntryStackItem* entry_stack_;