[ios] Turn on tests after fullscreen fix

Re-enable EG2Tests that were disabled because content was being hidden
behind the toolbar.

Bug: 1107989
Change-Id: I123bcab04934051b7475f9debcefc5b8c6a85497
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354727Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798247}

ios/chrome/browser/ui/download/download_manager_egtest.mm

@@ -203,8 +203,7 @@ bool WaitForOpenInDownloadsButton() {
 }
 
 // Tests "Open in New Tab" on download link.
-// TODO(crbug.com/1107378): reenable this test.
-- (void)DISABLED_testDownloadInNewTab {
+- (void)testDownloadInNewTab {
   [ChromeEarlGrey loadURL:self.testServer->GetURL("/")];
   [ChromeEarlGrey waitForWebStateContainingText:"Download"];
 

ios/chrome/browser/web/forms_egtest.mm

@@ -528,8 +528,7 @@ id<GREYMatcher> ResendPostButtonMatcher() {
 // Tests that submitting a POST-based form by tapping the 'Go' button on the
 // keyboard navigates to the correct URL and the back button works as expected
 // afterwards.
-// TODO(crbug.com/1106741): reenable this test.
-- (void)DISABLED_testPostFormEntryWithKeyboard {
+- (void)testPostFormEntryWithKeyboard {
   // Test fails on iPad Air 2 13.4 crbug.com/1102608.
   if ([ChromeEarlGrey isIPadIdiom] && base::ios::IsRunningOnOrLater(13, 0, 0)) {
     EARL_GREY_TEST_DISABLED(@"Fails in iOS 13 on iPads.");

ios/chrome/browser/web/tab_order_egtest.mm

@@ -47,8 +47,7 @@ const char kLinksTestURL2Text[] = "arrived";
 @implementation TabOrderTestCase
 
 // Tests that new tabs are always inserted after their parent tab.
-// TODO(crbug.com/1106739): reenable this test.
-- (void)DISABLED_testChildTabOrdering {
+- (void)testChildTabOrdering {
   GREYAssertTrue(self.testServer->Start(), @"Test server failed to start.");
   const GURL URL1 = self.testServer->GetURL(kLinksTestURL1);