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

@@ -886,38 +886,34 @@ 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;
-      var storedHash = null;
+        if (self.preferenceShowPreviousViewOnLoad &&
-      if (self.preferenceShowPreviousViewOnLoad &&
+            store.get('exists', false)) {
-          store.get('exists', false)) {
+          var pageNum = store.get('page', '1');
-        var pageNum = store.get('page', '1');
+          var zoom = self.preferenceDefaultZoomValue ||
-        var zoom = self.preferenceDefaultZoomValue ||
+                     store.get('zoom', self.pdfViewer.currentScale);
-                   store.get('zoom', self.pdfViewer.currentScale);
+          var left = store.get('scrollLeft', '0');
-        var left = store.get('scrollLeft', '0');
+          var top = store.get('scrollTop', '0');
-        var top = store.get('scrollTop', '0');
+
-
+          storedHash = 'page=' + pageNum + '&zoom=' + zoom + ',' +
-        storedHash = 'page=' + pageNum + '&zoom=' + zoom + ',' +
+                       left + ',' + top;
-                     left + ',' + top;
+        } else if (self.preferenceDefaultZoomValue) {
-      } else if (self.preferenceDefaultZoomValue) {
+          storedHash = 'page=1&zoom=' + self.preferenceDefaultZoomValue;
-        storedHash = 'page=1&zoom=' + self.preferenceDefaultZoomValue;
+        }
-      }
+        self.setInitialView(storedHash, scale);
-      self.setInitialView(storedHash, scale);
 
-      // Make all navigation keys work on document load,
+        // Make all navigation keys work on document load,
-      // unless the viewer is embedded in a web page.
+        // unless the viewer is embedded in a web page.
-      if (!self.isViewerEmbedded) {
+        if (!self.isViewerEmbedded) {
-        self.pdfViewer.focus();
+          self.pdfViewer.focus();
 //#if (FIREFOX || MOZCENTRAL)
-//      self.pdfViewer.blur();
+//        self.pdfViewer.blur();
 //#endif
-      }
+        }
-    }, function rejected(reason) {
+      }, function rejected(reason) {
-      console.error(reason);
+        console.error(reason);
-
-      firstPagePromise.then(function () {
         self.setInitialView(null, scale);
       });
     });