Remove raw DictionaryValue::Set in //chrome

chrome/common/custom_handlers/protocol_handler.cc

Index: chrome/common/custom_handlers/protocol_handler.cc
diff --git a/chrome/common/custom_handlers/protocol_handler.cc b/chrome/common/custom_handlers/protocol_handler.cc
index 0990f48d562eacc767e1c18760505b9c681f8055..85749b3ff2d7262ce9aa6cb67034b7b90ed58f68 100644
--- a/chrome/common/custom_handlers/protocol_handler.cc
+++ b/chrome/common/custom_handlers/protocol_handler.cc
@@ -61,8 +61,8 @@ GURL ProtocolHandler::TranslateUrl(const GURL& url) const {
 
 std::unique_ptr<base::DictionaryValue> ProtocolHandler::Encode() const {
   auto d = base::MakeUnique<base::DictionaryValue>();
-  d->Set("protocol", new base::Value(protocol_));
-  d->Set("url", new base::Value(url_.spec()));
+  d->SetString("protocol", protocol_);
+  d->SetString("url", url_.spec());
   return d;
 }