Disabled PageLoadMetricsBrowserTest.ReceivedAggregateResourceDataLength

Disabled test due to flaky timeouts that are observed on all platforms.

TBR=jkarlin@chromium.org

Bug: 882077
Change-Id: Icdc062abcfff372060ce8cb173adbf4aba542b40
Reviewed-on: https://chromium-review.googlesource.com/1215327Reviewed-by: Dominic Battré <battre@chromium.org>
Commit-Queue: Dominic Battré <battre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589885}

chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc

@@ -1767,8 +1767,9 @@ IN_PROC_BROWSER_TEST_F(SessionRestorePageLoadMetricsBrowserTest,
   ExpectFirstPaintMetricsTotalCount(1);
 }
 
+// TODO(crbug.com/882077) Disabled due to flaky timeouts on all platforms.
 IN_PROC_BROWSER_TEST_F(PageLoadMetricsBrowserTest,
-                       ReceivedAggregateResourceDataLength) {
+                       DISABLED_ReceivedAggregateResourceDataLength) {
   embedded_test_server()->ServeFilesFromSourceDirectory("content/test/data");
   content::SetupCrossSiteRedirector(embedded_test_server());
   ASSERT_TRUE(embedded_test_server()->Start());