Bug 1096787 - copy new logins.json database when using fx reset, r=MattN

--HG--
extra : rebase_source : e0d9ecd2d99c7e479869ee0066ab0521d21133f3

browser/components/migration/FirefoxProfileMigrator.js

@@ -75,9 +75,11 @@ FirefoxProfileMigrator.prototype._getResourcesInternal = function(sourceProfileD
     let files = [];
     for (let fileName of aFileNames) {
       let file = this._getFileObject(sourceProfileDir, fileName);
-      if (!file)
-        return null;
-      files.push(file);
+      if (file)
+        files.push(file);
+    }
+    if (!files.length) {
+      return null;
     }
     return {
       type: aMigrationType,
@@ -94,7 +96,7 @@ FirefoxProfileMigrator.prototype._getResourcesInternal = function(sourceProfileD
   let places = getFileResource(types.HISTORY, ["places.sqlite"]);
   let cookies = getFileResource(types.COOKIES, ["cookies.sqlite"]);
   let passwords = getFileResource(types.PASSWORDS,
-                                  ["signons.sqlite", "key3.db"]);
+                                  ["signons.sqlite", "logins.json", "key3.db"]);
   let formData = getFileResource(types.FORMDATA, ["formhistory.sqlite"]);
   let bookmarksBackups = getFileResource(types.OTHERDATA,
     [PlacesBackups.profileRelativeFolderPath]);