Disable flaky test HotwordPrivateApiTest.OnSpeakerModelSaved

chrome/browser/extensions/api/hotword_private/hotword_private_apitest.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 <memory>
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 435 matching lines @@
   ASSERT_TRUE(RunComponentExtensionTest("startTraining")) << message_;
   EXPECT_TRUE(listenerTrue.WaitUntilSatisfied());
   EXPECT_TRUE(service()->IsTraining());
 
   ExtensionTestMessageListener listenerFalse("stop training", false);
   ASSERT_TRUE(RunComponentExtensionTest("stopTraining")) << message_;
   EXPECT_TRUE(listenerFalse.WaitUntilSatisfied());
   EXPECT_FALSE(service()->IsTraining());
 }
 
-IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, OnSpeakerModelSaved) {
+// Flaky on ChromeOS (https://crbug.com/668335)
+#if defined(OS_CHROMEOS)
+#define MAYBE_OnSpeakerModelSaved DISABLED_OnSpeakerModelSaved
+#else
+#define MAYBE_OnSpeakerModelSaved OnSpeakerModelSaved
+#endif
+
+IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, MAYBE_OnSpeakerModelSaved) {
   extensions::HotwordPrivateEventService::GetFactoryInstance();
   ExtensionTestMessageListener listener("ready", false);
   ASSERT_TRUE(
       LoadExtensionAsComponent(test_data_dir_.AppendASCII(
           "onSpeakerModelSaved")));
   EXPECT_TRUE(listener.WaitUntilSatisfied());
 
   ExtensionTestMessageListener listenerNotification("notification", false);
   EXPECT_TRUE(listenerNotification.WaitUntilSatisfied());
 }
@@ skipping 73 matching lines @@
   ExtensionTestMessageListener setListenerF("set AH False: false failure",
                                             false);
   ExtensionTestMessageListener getListener("get AH: false failure", false);
 
   ASSERT_TRUE(RunComponentExtensionTest("audioHistory")) << message_;
 
   EXPECT_TRUE(setListenerT.WaitUntilSatisfied());
   EXPECT_TRUE(setListenerF.WaitUntilSatisfied());
   EXPECT_TRUE(getListener.WaitUntilSatisfied());
 }