Added Promise.catch

Fixed Promise so it rejects on uncaught exception
Catch possible rejection on ViewHistory.setMultiple

src/shared/util.js

@@ -1011,7 +1011,7 @@ PDFJS.createPromiseCapability = createPromiseCapability;
 
 /**
  * Polyfill for Promises:
- * The following promise implementation tries to generally implment the
+ * The following promise implementation tries to generally implement the
  * Promise/A+ spec. Some notable differences from other promise libaries are:
  * - There currently isn't a seperate deferred and promise object.
  * - Unhandled rejections eventually show an error if they aren't handled.
@@ -1057,6 +1057,11 @@ PDFJS.createPromiseCapability = createPromiseCapability;
         });
       };
     }
+    if (typeof globalScope.Promise.prototype.catch !== 'function') {
+      globalScope.Promise.prototype.catch = function (onReject) {
+        return globalScope.Promise.prototype.then(undefined, onReject);
+      };
+    }
     return;
   }
 //#if !MOZCENTRAL
@@ -1180,7 +1185,11 @@ PDFJS.createPromiseCapability = createPromiseCapability;
   function Promise(resolver) {
     this._status = STATUS_PENDING;
     this._handlers = [];
-    resolver.call(this, this._resolve.bind(this), this._reject.bind(this));
+    try {
+      resolver.call(this, this._resolve.bind(this), this._reject.bind(this));
+    } catch (e) {
+      this._reject(e);
+    }
   }
   /**
    * Builds a promise that is resolved when all the passed in promises are
@@ -1307,6 +1316,10 @@ PDFJS.createPromiseCapability = createPromiseCapability;
       });
       HandlerManager.scheduleHandlers(this);
       return nextPromise;
+    },
+    
+    catch: function Promise_catch(onReject) {
+      return this.then(undefined, onReject);
     }
   };
 

web/view_history.js

@@ -101,7 +101,7 @@ var ViewHistory = (function ViewHistoryClosure() {
         return;
       }
       this.file[name] = val;
-      this._writeToStorage();
+      return this._writeToStorage();
     },
 
     setMultiple: function ViewHistory_setMultiple(properties) {
@@ -111,7 +111,7 @@ var ViewHistory = (function ViewHistoryClosure() {
       for (var name in properties) {
         this.file[name] = properties[name];
       }
-      this._writeToStorage();
+      return this._writeToStorage();
     },
 
     get: function ViewHistory_get(name, defaultValue) {

web/viewer.js

@@ -1983,6 +1983,8 @@ function updateViewarea() {
       'zoom': normalizedScaleValue,
       'scrollLeft': intLeft,
       'scrollTop': intTop
+    }).catch(function() {
+      // unable to write to storage
     });
   });
   var href = PDFView.getAnchorUrl(pdfOpenParams);