test: update tests to not run jasmine done function in sync-test zone from describe block

There are some ZoneJS tests that fork the zone from the `describe` block
for testing the zone patching. This does cause the Jasmine `done`
function later in `it` specs to be invoked in the sync-test zone from
the original `describe` block. The `done` implementation now has
changed with the Karma Jasmine update and breaks because it now causes
tasks to be scheduled.

It is conceptually incorrect/invalid to take the describe sync zone and
run test logic with that sync zone.

```
 An error was thrown in afterAll
  error properties: Object({ originalStack: 'Error: Cannot call jasmine.execute().forceTask from within a sync test (syncTestZone for jasmine.describe#FileReader).
      at new ZoneAwareError (packages/zone.js/test/browser_test_rollup.umd.js:98:37)
      at e.onScheduleTask (packages/zone.js/bundles/zone-testing-bundle.umd.min.js:158:196)
      at e.scheduleTask (packages/zone.js/bundles/zone-testing-bundle.umd.min.js:14:7529)
      at t.scheduleTask (packages/zone.js/bundles/zone-testing-bundle.umd.min.js:14:3539)
      at t.scheduleMicroTask (packages/zone.js/bundles/zone-testing-bundle.umd.min.js:14:3791)
      at r.execute (packages/zone.js/bundles/zone-testing-bundle.umd.min.js:166:4312)
      at queueRunnerFa ...
      at <Jasmine>
```

Author: devversion

packages/zone.js/test/browser/FileReader.spec.ts

@@ -13,7 +13,6 @@ describe('FileReader', ifEnvSupports('FileReader', function() {
            let fileReader: FileReader;
            let blob: Blob;
            const data = 'Hello, World!';
-           const testZone = Zone.current.fork({name: 'TestZone'});
 
            // Android 4.3's native browser doesn't implement add/RemoveEventListener for FileReader
            function supportsEventTargetFns() {
@@ -39,6 +38,8 @@ describe('FileReader', ifEnvSupports('FileReader', function() {
 
            describe('EventTarget methods', ifEnvSupports(supportsEventTargetFns, function() {
                       it('should bind addEventListener listeners', function(done) {
+                        const testZone = Zone.current.fork({name: 'TestZone'});
+
                         testZone.run(function() {
                           fileReader.addEventListener('load', function() {
                             expect(Zone.current).toBe(testZone);
@@ -51,6 +52,7 @@ describe('FileReader', ifEnvSupports('FileReader', function() {
                       });
 
                       it('should remove listeners via removeEventListener', function(done) {
+                        const testZone = Zone.current.fork({name: 'TestZone'});
                         const listenerSpy = jasmine.createSpy('listener');
 
                         testZone.run(function() {
@@ -67,6 +69,7 @@ describe('FileReader', ifEnvSupports('FileReader', function() {
                     }));
 
            it('should bind onEventType listeners', function(done) {
+             const testZone = Zone.current.fork({name: 'TestZone'});
              let listenersCalled = 0;
 
              testZone.run(function() {

packages/zone.js/test/browser/MutationObserver.spec.ts

@@ -12,13 +12,13 @@ declare const global: any;
 
 describe('MutationObserver', ifEnvSupports('MutationObserver', function() {
            let elt: HTMLDivElement;
-           const testZone = Zone.current.fork({name: 'test'});
 
            beforeEach(function() {
              elt = document.createElement('div');
            });
 
            it('should run observers within the zone', function(done) {
+             const testZone = Zone.current.fork({name: 'test'});
              let ob;
 
              testZone.run(function() {
@@ -54,9 +54,8 @@ describe('MutationObserver', ifEnvSupports('MutationObserver', function() {
          }));
 
 describe('WebKitMutationObserver', ifEnvSupports('WebKitMutationObserver', function() {
-           const testZone = Zone.current.fork({name: 'test'});
-
            it('should run observers within the zone', function(done) {
+             const testZone = Zone.current.fork({name: 'test'});
              let elt: HTMLDivElement;
 
              testZone.run(function() {