Disable flaky test HotwordPrivateApiTest.OnSpeakerModelSaved

chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc

Index: chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
diff --git a/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc b/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
index fd8a8ae328163e05b5ae4d719dee679128b87b30..943b763adf3a7fa61b4983efa14bccd88dd66e05 100644
--- a/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
+++ b/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
@@ -453,7 +453,14 @@ IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, Training) {
   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(