[sheriff] Disable DetachToBrowserTabDragControllerTest.DragAllToSeparateWindowAndCancel.

It was already disabled on Mac. Given that crbug.com/1163775 documents
failures on Windows and Linux too, this CL disables it for all platforms.

R=cyan@chromium.org

Bug: 1163775
Change-Id: Ic80521a7879ed88eb8f62082bedc4368dabaecf9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626780
Commit-Queue: François Doray <fdoray@chromium.org>
Commit-Queue: Charlene Yan <cyan@chromium.org>
Auto-Submit: François Doray <fdoray@chromium.org>
Reviewed-by: Charlene Yan <cyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843253}

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc

@@ -2578,7 +2578,9 @@ void DragAllToSeparateWindowAndCancelStep2(
 #define MAYBE_DragAllToSeparateWindowAndCancel \
   DISABLED_DragAllToSeparateWindowAndCancel
 #else
-#define MAYBE_DragAllToSeparateWindowAndCancel DragAllToSeparateWindowAndCancel
+// TODO(https://crbug.com/1163775): Flaky on Windows and Linux.
+#define MAYBE_DragAllToSeparateWindowAndCancel \
+  DISABLED_DragAllToSeparateWindowAndCancel
 #endif
 
 // Creates two browsers, selects all tabs in first, drags into second, then hits