Small refactoring of the code that calls |PDFViewerApplication.setInitialView|

This is a minor cleanup, to avoid an unnecessary `Promise.all` and to simplify catching |ViewHistory| errors.

web/viewer.js

@@ -886,10 +886,8 @@ var PDFViewerApplication = {
         }
         PDFHistory.initialize(self.documentFingerprint, self);
       }
-    });
 
-    var storePromise = store.initializedPromise;
+      store.initializedPromise.then(function resolved() {
-    Promise.all([firstPagePromise, storePromise]).then(function resolved() {
         var storedHash = null;
         if (self.preferenceShowPreviousViewOnLoad &&
             store.get('exists', false)) {
@@ -916,8 +914,6 @@ var PDFViewerApplication = {
         }
       }, function rejected(reason) {
         console.error(reason);
-
-      firstPagePromise.then(function () {
         self.setInitialView(null, scale);
       });
     });