message: optimize show()
  Summary: Implement two show() functions with std::string.
diff: @@ -617,6 +617,16 @@ std::ostream& operator<<(std::ostream& o, const DexType& type) {
  return o;
  }
  +inline std::string show(DexString* p) {
  + if (!p) return "";
  + return p->str();
  +}
  +
  +inline std::string show(DexType* p) {
  + if (!p) return "";
  + return p->get_name()->str();
  +}
  +
  // This format must match the proguard map format because it's used to look up
  // in the proguard map
  std::string show(const DexFieldRef* p) {
  