Disable a flaky test.

chrome/browser/profiles/profile_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/profiles/profile.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
@@ skipping 141 matching lines @@
 
   {
     scoped_ptr<Profile> profile(CreateProfile(
         temp_dir.path(), &delegate, Profile::CREATE_MODE_SYNCHRONOUS));
     CheckChromeVersion(profile.get(), false);
   }
 
   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());
 
   MockProfileDelegate delegate;
   EXPECT_CALL(delegate, OnProfileCreated(testing::NotNull(), true, true));
 
   {
     content::WindowedNotificationObserver observer(
         chrome::NOTIFICATION_PROFILE_CREATED,
         content::NotificationService::AllSources());
@@ skipping 277 matching lines @@
     }
 
     // Release the IO thread thread.
     unblock->Signal();
   }
 
   ASSERT_TRUE(mis_wrote);
 }
 
 #endif  // defined(USE_X11) || defined(OS_WIN)