Add module suffix in .mojom files for components/arc

chrome/browser/chromeos/arc/arc_auth_service_unittest.cc

Index: chrome/browser/chromeos/arc/arc_auth_service_unittest.cc
diff --git a/chrome/browser/chromeos/arc/arc_auth_service_unittest.cc b/chrome/browser/chromeos/arc/arc_auth_service_unittest.cc
index 90f056c08fc6a36898fe89cc2359ea639291fcd5..7ce9bbc72d637ed05b046cee416747351d1028f0 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service_unittest.cc
+++ b/chrome/browser/chromeos/arc/arc_auth_service_unittest.cc
@@ -228,7 +228,8 @@ TEST_F(ArcAuthServiceTest, SignInStatus) {
   EXPECT_EQ(ArcBridgeService::State::READY, bridge_service()->state());
 
   // Report failure.
-  auth_service()->OnSignInFailed(arc::ArcSignInFailureReason::UNKNOWN_ERROR);
+  auth_service()->OnSignInFailed(
+      arc::mojom::ArcSignInFailureReason::UNKNOWN_ERROR);
   EXPECT_FALSE(prefs->GetBoolean(prefs::kArcSignedIn));
   EXPECT_EQ(ArcAuthService::State::STOPPED, auth_service()->state());
   EXPECT_EQ(ArcBridgeService::State::STOPPED, bridge_service()->state());