Disable `TopControlsSlideControllerTest.TestScrollingPage`

`TopControlsSlideControllerTest.TestScrollingPage` is flakily timing out
on ChromeOS builders. See [1], and [2], and [3].

[1]: https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=TopControlsSlideControllerTest.TestScrollingPage&testType=browser_tests
[2]: https://ci.chromium.org/p/chromium/builders/ci/linux-chromeos-dbg/19632
[3]: https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8874539563088802240/+/steps/browser_tests/0/logs/Deterministic_failure:_TopControlsSlideControllerTest.TestScrollingPage__status_TIMEOUT_/0

TBR: afakhry@chromium.org
Bug: 1106700
Change-Id: If3f33c2c6bfeed156b422193d57ac599b746af7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2303439Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789439}

chrome/browser/ui/views/frame/top_controls_slide_controller_chromeos_browsertest.cc

@@ -631,7 +631,9 @@ IN_PROC_BROWSER_TEST_F(TopControlsSlideControllerTest,
       browser_view()->GetActiveWebContents()));
 }
 
-IN_PROC_BROWSER_TEST_F(TopControlsSlideControllerTest, TestScrollingPage) {
+// TODO(https://crbug.com/1106700): Flakily timing out.
+IN_PROC_BROWSER_TEST_F(TopControlsSlideControllerTest,
+                       DISABLED_TestScrollingPage) {
   ToggleTabletMode();
   ASSERT_TRUE(GetTabletModeEnabled());
   EXPECT_TRUE(top_controls_slide_controller()->IsEnabled());