remove some calls to to-be-deprecated v8::Value::To* functions

extensions/renderer/print_native_handler.cc

Index: extensions/renderer/print_native_handler.cc
diff --git a/extensions/renderer/print_native_handler.cc b/extensions/renderer/print_native_handler.cc
index 1e83b0e5b9529031fc61cf9940109c6f9a0858c6..8e71eb5f7b5ccba832b1db96d4240765d5a19772 100644
--- a/extensions/renderer/print_native_handler.cc
+++ b/extensions/renderer/print_native_handler.cc
@@ -24,7 +24,7 @@ void PrintNativeHandler::Print(
 
   std::vector<std::string> components;
   for (int i = 0; i < args.Length(); ++i)
-    components.push_back(*v8::String::Utf8Value(args[i]->ToString()));
+    components.push_back(*v8::String::Utf8Value(args[i]));
 
   LOG(ERROR) << JoinString(components, ',');
 }