Disable OpenInManagerTestCase/testOpenIn

It seems to be flaky.

TBR=marq@chromium.org

BUG=1146303

Change-Id: Ibaa9ea626a6179af72a1b98d5660f990b3390f1b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526608Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825414}

ios/chrome/browser/ui/open_in/open_in_controller_egtest.mm

@@ -48,7 +48,9 @@ id<GREYMatcher> ShareMenuDismissButton() {
 
 // Tests that open in button appears when opening a PDF, and that tapping on it
 // will open the activity view.
-- (void)testOpenIn {
+//
+// Disabled due to flakiness: http://crbug.com/1146303
+- (void)DISABLED_testOpenIn {
   // TODO(crbug.com/1135805): The share menu displays in a popover on iPad,
   // which causes this test to fail.
   if ([ChromeEarlGrey isIPadIdiom]) {