Bug 1259846 - QI Services.appinfo to nsICrashReporter because it might not have been QIed yet. r=Mossop

MozReview-Commit-ID: KqyzDnLVENW

browser/extensions/e10srollout/bootstrap.js

@@ -95,7 +95,7 @@ function getUserSample() {
 function setCohort(cohortName) {
   Preferences.set(PREF_COHORT_NAME, cohortName);
   try {
-    Services.appinfo.annotateCrashReport("E10SCohort", cohortName);
+    Services.appinfo.QueryInterface(Ci.nsICrashReporter).annotateCrashReport("E10SCohort", cohortName);
   } catch (e) {}
 }