backout 3d0d92f2406b for not working properly

mobile/android/modules/HomeProvider.jsm

@@ -89,10 +89,6 @@ var gTimerRegistered = false;
 // Map of datasetId -> { interval: <integer>, callback: <function> }
 var gSyncCallbacks = {};
 
-// Whether or not writes to the provider are expected.
-// e.g. save() and deleteAll()
-var gWritesAreExpected = false;
-
 /**
  * nsITimerCallback implementation. Checks to see if it's time to sync any registered datasets.
  *
@@ -158,10 +154,7 @@ this.HomeProvider = Object.freeze({
       return false;
     }
 
-    gWritesAreExpected = true;
     callback(datasetId);
-    gWritesAreExpected = false;
-
     return true;
   },
 
@@ -299,10 +292,6 @@ HomeStorage.prototype = {
    * @resolves When the operation has completed.
    */
   save: function(data) {
-    if (!gWritesAreExpected) {
-      Cu.reportError("HomeStorage: save() called outside of sync window");
-    }
-
     return Task.spawn(function save_task() {
       let db = yield getDatabaseConnection();
       try {
@@ -342,10 +331,6 @@ HomeStorage.prototype = {
    * @resolves When the operation has completed.
    */
   deleteAll: function() {
-    if (!gWritesAreExpected) {
-      Cu.reportError("HomeStorage: deleteAll() called outside of sync window");
-    }
-
     return Task.spawn(function delete_all_task() {
       let db = yield getDatabaseConnection();
       try {