Disable flaky ExtensionTagsTest.PreAndPostExistingTaskProviding

chrome/browser/task_manager/providers/web_contents/extension_tag_browsertest.cc

Index: chrome/browser/task_manager/providers/web_contents/extension_tag_browsertest.cc
diff --git a/chrome/browser/task_manager/providers/web_contents/extension_tag_browsertest.cc b/chrome/browser/task_manager/providers/web_contents/extension_tag_browsertest.cc
index 52a22acfbba9dfc4c7d67dd66651e48d3000ccee..e4eb70b0fd3a509f9f83aa81e35176b633019b0d 100644
--- a/chrome/browser/task_manager/providers/web_contents/extension_tag_browsertest.cc
+++ b/chrome/browser/task_manager/providers/web_contents/extension_tag_browsertest.cc
@@ -73,7 +73,9 @@ IN_PROC_BROWSER_TEST_F(ExtensionTagsTest, Basic) {
   EXPECT_EQ(1U, tracked_tags().size());
 }
 
-IN_PROC_BROWSER_TEST_F(ExtensionTagsTest, PreAndPostExistingTaskProviding) {
+// Disabled due to flakiness, see crbug.com/519333 and crbug.com/639185.
+IN_PROC_BROWSER_TEST_F(ExtensionTagsTest,
+                       DISABLED_PreAndPostExistingTaskProviding) {
   // Browser tests start with a single tab.
   EXPECT_EQ(1U, tracked_tags().size());
   MockWebContentsTaskManager task_manager;