Disable a flaky test.

chrome/browser/profiles/profile_browsertest.cc

Index: chrome/browser/profiles/profile_browsertest.cc
diff --git a/chrome/browser/profiles/profile_browsertest.cc b/chrome/browser/profiles/profile_browsertest.cc
index 509e761b70b47eaa972a289175a3390628493e0f..d192bc908abab0ea717a3924c3422215a2768514 100644
--- a/chrome/browser/profiles/profile_browsertest.cc
+++ b/chrome/browser/profiles/profile_browsertest.cc
@@ -159,9 +159,11 @@ IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, CreateOldProfileSynchronous) {
   FlushIoTaskRunnerAndSpinThreads();
 }
 
+// Flaky: http://crbug.com/393177
 // Test OnProfileCreate is called with is_new_profile set to true when
 // creating a new profile asynchronously.
-IN_PROC_BROWSER_TEST_F(ProfileBrowserTest, CreateNewProfileAsynchronous) {
+IN_PROC_BROWSER_TEST_F(ProfileBrowserTest,
+                       DISABLED_CreateNewProfileAsynchronous) {
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());