Disable flaky ContentFaviconDriverTest.ShouldNotRequestRepeatedlyIfUnavailable

TBR=mastiz@chromium.org

Bug: 1011196
Change-Id: Icd3cfd3860068b1530d5393868fedd2b6bcb2c78
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1839312Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Auto-Submit: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702699}

components/favicon/content/content_favicon_driver_unittest.cc

@@ -120,7 +120,8 @@ TEST_F(ContentFaviconDriverTest, DISABLED_ShouldNotCauseImageDownload) {
 
 // Test that Favicon is not requested repeatedly during the same session if
 // the favicon is known to be unavailable (e.g. due to HTTP 404 status).
-TEST_F(ContentFaviconDriverTest, ShouldNotRequestRepeatedlyIfUnavailable) {
+TEST_F(ContentFaviconDriverTest,
+       DISABLED_ShouldNotRequestRepeatedlyIfUnavailable) {
   ON_CALL(favicon_service_, WasUnableToDownloadFavicon(kIconURL))
       .WillByDefault(Return(true));
   // Mimic a page load.