[inspector] Store interger in context embedder data instead of a string.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 86e9935a9f4d3f3ea985e1a25b2859875a4ed18c..b311a35eef597a8ec4d56473b3e8eadbd4be9e0c 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -8972,14 +8972,12 @@ MaybeLocal<String> debug::Script::SourceMappingURL() const {
       handle_scope.CloseAndEscape(i::Handle<i::String>::cast(value)));
 }
 
-MaybeLocal<String> debug::Script::ContextData() const {
+MaybeLocal<Value> debug::Script::ContextData() const {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   i::HandleScope handle_scope(isolate);
   i::Handle<i::Script> script = Utils::OpenHandle(this);
   i::Handle<i::Object> value(script->context_data(), isolate);
-  if (!value->IsString()) return MaybeLocal<String>();
-  return Utils::ToLocal(
-      handle_scope.CloseAndEscape(i::Handle<i::String>::cast(value)));
+  return Utils::ToLocal(handle_scope.CloseAndEscape(value));
 }
 
 MaybeLocal<String> debug::Script::Source() const {