Renamed "symbols" to "internalized strings" throughout the code base,

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index e97dcad6dd770f250e0706081218e5111495ea1f..34519df4ff8416fd1dd5d001b71f9cce7f4c33eb 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -282,7 +282,7 @@ Handle<Object> SetPropertyWithInterceptor(Handle<JSObject> object,
 Handle<Object> GetProperty(Handle<JSReceiver> obj,
                            const char* name) {
   Isolate* isolate = obj->GetIsolate();
-  Handle<String> str = isolate->factory()->LookupUtf8Symbol(name);
+  Handle<String> str = isolate->factory()->InternalizeUtf8String(name);
   CALL_HEAP_FUNCTION(isolate, obj->GetProperty(*str), Object);
 }
 
@@ -609,7 +609,7 @@ v8::Handle<v8::Array> GetKeysForIndexedInterceptor(Handle<JSReceiver> receiver,
 Handle<Object> GetScriptNameOrSourceURL(Handle<Script> script) {
   Isolate* isolate = script->GetIsolate();
   Handle<String> name_or_source_url_key =
-      isolate->factory()->LookupOneByteSymbol(
+      isolate->factory()->InternalizeOneByteString(
           STATIC_ASCII_VECTOR("nameOrSourceURL"));
   Handle<JSValue> script_wrapper = GetScriptWrapper(script);
   Handle<Object> property = GetProperty(script_wrapper,