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

components/translate/content/renderer/translate_helper.cc

Index: components/translate/content/renderer/translate_helper.cc
diff --git a/components/translate/content/renderer/translate_helper.cc b/components/translate/content/renderer/translate_helper.cc
index 0e0f4c78ab2abd6a7292c4642990be38e6d061b2..83d9bc3d51192d962bcfa39db89cf587dd92201a 100644
--- a/components/translate/content/renderer/translate_helper.cc
+++ b/components/translate/content/renderer/translate_helper.cc
@@ -310,7 +310,7 @@ std::string TranslateHelper::ExecuteScriptAndGetStringResult(
     return std::string();
   }
 
-  v8::Local<v8::String> v8_str = results[0]->ToString();
+  v8::Local<v8::String> v8_str = results[0].As<v8::String>();
   int length = v8_str->Utf8Length() + 1;
   scoped_ptr<char[]> str(new char[length]);
   v8_str->WriteUtf8(str.get(), length);