Modify the base::JSONReader interface to take a set of options rather than a boolean flag.

chrome/test/webdriver/webdriver_session.cc

Index: chrome/test/webdriver/webdriver_session.cc
diff --git a/chrome/test/webdriver/webdriver_session.cc b/chrome/test/webdriver/webdriver_session.cc
index 6faabd6f95e33c377700c94a8e52819552a79bd9..af17a5c982ded49a7d38b775f148579bad7bcb44 100644
--- a/chrome/test/webdriver/webdriver_session.cc
+++ b/chrome/test/webdriver/webdriver_session.cc
@@ -1471,7 +1471,7 @@ Error* Session::ExecuteScriptAndParseValue(const FrameId& frame_id,
     return error;
 
   scoped_ptr<Value> value(base::JSONReader::ReadAndReturnError(
-      response_json, true, NULL, NULL));
+      response_json, base::JSON_ALLOW_TRAILING_COMMAS, NULL, NULL));
   if (!value.get())
     return new Error(kUnknownError, "Failed to parse script result");
   if (value->GetType() != Value::TYPE_DICTIONARY)