[ozone/x11] Updated TODOs in X11-related tests.

Some unit tests should be removed or re-worked when non-Ozone X11 is
deprecated.  Here the TODOs are changed so they refer to the relevant
issue.

Bug: 1109112
Change-Id: I221c8447b62bb4aa4a7e38acb53cca84ff6427d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526300Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Auto-Submit: Alexander Dunaev <adunaev@igalia.com>
Cr-Commit-Position: refs/heads/master@{#826382}

ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc

@@ -70,7 +70,7 @@ class DesktopScreenX11Test : public views::ViewsTestBase,
   // Overridden from testing::Test:
   void SetUp() override {
     ViewsTestBase::SetUp();
-    // TODO(msisov): rewrite desktop screen tests for ozone and non-ozone Linux.
+    // TODO(crbug.com/1096425): Once non-Ozone X11 is deprecated, re-work this.
     if (features::IsUsingOzonePlatform())
       GTEST_SKIP();
     // Initialize the world to the single monitor case.

ui/views/widget/desktop_aura/x11_drag_drop_client_unittest.cc

@@ -485,7 +485,7 @@ class X11DragDropClientTest : public ViewsTestBase {
     set_native_widget_type(NativeWidgetType::kDesktop);
 
     ViewsTestBase::SetUp();
-    // TODO(msisov): rewrite these tests for ozone and non-ozone Linux.
+    // TODO(crbug.com/1096425): Once non-Ozone X11 is deprecated, re-work this.
     if (features::IsUsingOzonePlatform())
       GTEST_SKIP();