Fix spelling mistake from registred to registered

atom/browser/api/atom_api_protocol.cc

@@ -157,8 +157,8 @@ void Protocol::OnIOCompleted(
 std::string Protocol::ErrorCodeToString(ProtocolError error) {
   switch (error) {
     case PROTOCOL_FAIL: return "Failed to manipulate protocol factory";
-    case PROTOCOL_REGISTERED: return "The scheme has been registred";
-    case PROTOCOL_NOT_REGISTERED: return "The scheme has not been registred";
+    case PROTOCOL_REGISTERED: return "The scheme has been registered";
+    case PROTOCOL_NOT_REGISTERED: return "The scheme has not been registered";
     case PROTOCOL_INTERCEPTED: return "The scheme has been intercepted";
     case PROTOCOL_NOT_INTERCEPTED: return "The scheme has not been intercepted";
     default: return "Unexpected error";

spec/api-protocol-spec.js

@@ -591,7 +591,7 @@ describe('protocol module', function () {
       })
     })
 
-    it('returns false when scheme is not registred', function (done) {
+    it('returns false when scheme is not registered', function (done) {
       protocol.isProtocolHandled('no-exist', function (result) {
         assert.equal(result, false)
         done()