Disable all the tests that are flaking more than 5% on ChromeOS builders.

chrome/browser/chromeos/accessibility/spoken_feedback_browsertest.cc

 // Copyright 2014 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 <queue>
 
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/strings/string_util.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 49 matching lines @@
     ASSERT_TRUE(
         ui_test_utils::SendKeyPressToWindowSync(
             root_window, key, false, false, false, false));
   }
 
  private:
   StubBrailleController braille_controller_;
   DISALLOW_COPY_AND_ASSIGN(LoggedInSpokenFeedbackTest);
 };
 
-IN_PROC_BROWSER_TEST_F(LoggedInSpokenFeedbackTest, AddBookmark) {
+// http://crbug.com/396507
+IN_PROC_BROWSER_TEST_F(LoggedInSpokenFeedbackTest, DISABLED_AddBookmark) {
   EXPECT_FALSE(AccessibilityManager::Get()->IsSpokenFeedbackEnabled());
 
   SpeechMonitor monitor;
   AccessibilityManager::Get()->EnableSpokenFeedback(
       true, ash::A11Y_NOTIFICATION_NONE);
   EXPECT_TRUE(monitor.SkipChromeVoxEnabledMessage());
 
   chrome::ExecuteCommand(browser(), IDC_SHOW_BOOKMARK_BAR);
 
   // Create a bookmark with title "foo".
@@ skipping 202 matching lines @@
   EXPECT_EQ("Select your language:", monitor.GetNextUtterance());
   EXPECT_EQ("English ( United States)", monitor.GetNextUtterance());
   EXPECT_TRUE(MatchPattern(monitor.GetNextUtterance(), "Combo box * of *"));
   ASSERT_TRUE(
       ui_test_utils::SendKeyPressToWindowSync(
           window, ui::VKEY_TAB, false, false, false, false));
   EXPECT_EQ("Select your keyboard:", monitor.GetNextUtterance());
 }
 
 }  // namespace chromeos