[M103] Disable PageLoadMetricsBrowserTest.MainFrameViewportRect

(cherry picked from commit 1f1a139)

Bug: 1324432
Change-Id: I60b80265184af999319bfb11402141e45c0ff46b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3648493
Commit-Queue: Thomas Guilbert <tguilbert@chromium.org>
Auto-Submit: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Owners-Override: Dale Curtis <dalecurtis@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1003396}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3671737
Auto-Submit: Elaine Chien <elainechien@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Owners-Override: Elly Fong-Jones <ellyjones@chromium.org>
Owners-Override: Elaine Chien <elainechien@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/branch-heads/5060@{#281}
Cr-Branched-From: b83393d-refs/heads/main@{#1002911}

chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc

@@ -577,7 +577,9 @@ IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, NoNavigation) {
       << "Recorded metrics: " << GetRecordedPageLoadMetricNames();
 }
 
-IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest, MainFrameViewportRect) {
+// TODO(crbug.com/1324432): Re-enable this test
+IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
+                       DISABLED_MainFrameViewportRect) {
   ASSERT_TRUE(embedded_test_server()->Start());
   GURL url = embedded_test_server()->GetURL(
       "a.com", "/scroll/scrollable_page_with_content.html");