Disable AdsPageLoadMetricsObserverBrowserTest.PageAdDensityIgnoreDisplayNoneFrame on Windows.

Test was recently added, flaky on various windows builders.

TBR=justinmiron@chromium.org

Bug: 1121444
Change-Id: I962811e829051da2a9ff00c015613357b3d0664e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2371729Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Fergal Daly <fergal@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801308}

chrome/browser/page_load_metrics/observers/ad_metrics/ads_page_load_metrics_observer_browsertest.cc

@@ -425,6 +425,13 @@ IN_PROC_BROWSER_TEST_F(AdsPageLoadMetricsObserverBrowserTest,
 
 // Creates a frame with display:none styling and verifies that it has an
 // empty intersection with the main frame.
+#if defined(OS_WIN)
+#define MAYBE_PageAdDensityIgnoreDisplayNoneFrame \
+  DISABLED_PageAdDensityIgnoreDisplayNoneFrame
+#else
+#define MAYBE_PageAdDensityIgnoreDisplayNoneFrame \
+  PageAdDensityIgnoreDisplayNoneFrame
+#endif
 IN_PROC_BROWSER_TEST_F(AdsPageLoadMetricsObserverBrowserTest,
                        PageAdDensityIgnoreDisplayNoneFrame) {
   base::HistogramTester histogram_tester;