Add interceptor support for symbols

samples/process.cc

Index: samples/process.cc
diff --git a/samples/process.cc b/samples/process.cc
index 4db7eeb7b87c426f1efd8f39a54fe1b1b2993600..b0663925dcbb96ab20c72dd00086a30572736911 100644
--- a/samples/process.cc
+++ b/samples/process.cc
@@ -116,9 +116,9 @@ class JsHttpRequestProcessor : public HttpRequestProcessor {
                            const PropertyCallbackInfo<Value>& info);
 
   // Callbacks that access maps
-  static void MapGet(Local<String> name,
+  static void MapGet(Local<Name> name,
                      const PropertyCallbackInfo<Value>& info);
-  static void MapSet(Local<String> name,
+  static void MapSet(Local<Name> name,
                      Local<Value> value,
                      const PropertyCallbackInfo<Value>& info);
 
@@ -359,13 +359,15 @@ string ObjectToString(Local<Value> value) {
 }
 
 
-void JsHttpRequestProcessor::MapGet(Local<String> name,
+void JsHttpRequestProcessor::MapGet(Local<Name> name,
                                     const PropertyCallbackInfo<Value>& info) {
+  if (name->IsSymbol()) return;
+
   // Fetch the map wrapped by this object.
   map<string, string>* obj = UnwrapMap(info.Holder());
 
   // Convert the JavaScript string to a std::string.
-  string key = ObjectToString(name);
+  string key = ObjectToString(Local<String>::Cast(name));
 
   // Look up the value if it exists using the standard STL ideom.
   map<string, string>::iterator iter = obj->find(key);
@@ -381,14 +383,16 @@ void JsHttpRequestProcessor::MapGet(Local<String> name,
 }
 
 
-void JsHttpRequestProcessor::MapSet(Local<String> name,
+void JsHttpRequestProcessor::MapSet(Local<Name> name,
                                     Local<Value> value_obj,
                                     const PropertyCallbackInfo<Value>& info) {
+  if (name->IsSymbol()) return;
+
   // Fetch the map wrapped by this object.
   map<string, string>* obj = UnwrapMap(info.Holder());
 
   // Convert the key and value to std::strings.
-  string key = ObjectToString(name);
+  string key = ObjectToString(Local<String>::Cast(name));
   string value = ObjectToString(value_obj);
 
   // Update the map.