Remove ListValue::Append(new {Fundamental,String}Value(...)) pattern in //net

net/http/transport_security_persister.cc

Index: net/http/transport_security_persister.cc
diff --git a/net/http/transport_security_persister.cc b/net/http/transport_security_persister.cc
index e383c392ebc69c1ff4d24622fdc15233df2d1ae6..a37d2379db2993f847c9461dc42e8ef8d49fd30f 100644
--- a/net/http/transport_security_persister.cc
+++ b/net/http/transport_security_persister.cc
@@ -29,7 +29,7 @@ namespace {
 base::ListValue* SPKIHashesToListValue(const HashValueVector& hashes) {
   base::ListValue* pins = new base::ListValue;
   for (size_t i = 0; i != hashes.size(); i++)
-    pins->Append(new base::StringValue(hashes[i].ToString()));
+    pins->AppendString(hashes[i].ToString());
   return pins;
 }