Convert src/net to use std::string/char* for DictionaryValue keys.

net/url_request/url_request_netlog_params.cc

Index: net/url_request/url_request_netlog_params.cc
diff --git a/net/url_request/url_request_netlog_params.cc b/net/url_request/url_request_netlog_params.cc
index 3693ee9c9eb3a1742b91c9acfb04b547be8aaafa..56414b180b4c697e169570bbb52e3c6bd47e8b31 100644
--- a/net/url_request/url_request_netlog_params.cc
+++ b/net/url_request/url_request_netlog_params.cc
@@ -19,9 +19,9 @@ URLRequestStartEventParameters::URLRequestStartEventParameters(
 
 Value* URLRequestStartEventParameters::ToValue() const {
   DictionaryValue* dict = new DictionaryValue();
-  dict->SetString(L"url", url_.possibly_invalid_spec());
-  dict->SetString(L"method", method_);
-  dict->SetInteger(L"load_flags", load_flags_);
-  dict->SetInteger(L"priority", static_cast<int>(priority_));
+  dict->SetString("url", url_.possibly_invalid_spec());
+  dict->SetString("method", method_);
+  dict->SetInteger("load_flags", load_flags_);
+  dict->SetInteger("priority", static_cast<int>(priority_));
   return dict;
 }