Bug 1454820 - Add support for system addon signing for web extension bundling. r=johannh,kmag

MozReview-Commit-ID: 3dpQKGHOgLa

toolkit/components/extensions/ExtensionTestCommon.jsm

@@ -373,12 +373,19 @@ var ExtensionTestCommon = class ExtensionTestCommon {
       id = uuidGen.generateUUID().number;
     }
 
+    let signedState = AddonManager.SIGNEDSTATE_SIGNED;
+    if (data.isPrivileged) {
+      signedState = AddonManager.SIGNEDSTATE_PRIVILEGED;
+    }
+    if (data.isSystem) {
+      signedState = AddonManager.SIGNEDSTATE_SYSTEM;
+    }
+
     return new Extension({
       id,
       resourceURI: jarURI,
       cleanupFile: file,
-      signedState: data.isPrivileged ? AddonManager.SIGNEDSTATE_PRIVILEGED
-                                     : AddonManager.SIGNEDSTATE_SIGNED,
+      signedState,
       temporarilyInstalled: !!data.temporarilyInstalled,
     });
   }