Bug 1930994 - Replace use of mozilla::clamped with std::clamp. r=longsonr,darktrojan

Differential Revision: https://phabricator.services.mozilla.com/D228876

--HG--
extra : rebase_source : b3acfd1976557a7d5d7097d8d082dd0e429cca21
extra : amend_source : 3ae0907f063c9d892281e3f78174aa66044e22e9

mailnews/base/src/nsMsgProtocol.cpp

@@ -107,7 +107,7 @@ nsresult nsMsgProtocol::GetQoSBits(uint8_t* aQoSBits) {
   int32_t val;
   rv = prefBranch->GetIntPref(prefName.get(), &val);
   NS_ENSURE_SUCCESS(rv, rv);
-  *aQoSBits = (uint8_t)clamped(val, 0, 0xff);
+  *aQoSBits = (uint8_t)std::clamp(val, 0, 0xff);
   return NS_OK;
 }