[ios] Enable new fullscreen egtests.

Bug: 799345
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I6c077be0ac58af923209234c27511b4433b0685d
Reviewed-on: https://chromium-review.googlesource.com/896812Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534075}

ios/chrome/browser/ui/fullscreen/fullscreen_egtest.mm

@@ -77,8 +77,6 @@ void AssertURLIs(const GURL& expectedURL) {
 @implementation FullscreenTestCase
 
 - (void)setUp {
-  // TODO(crbug.com/799345): Remove scoped feature list.
-  _featureList.InitAndDisableFeature(fullscreen::features::kNewFullscreen);
   [super setUp];
 }