Hotword Private API: Add function and event to query the existence of a speaker model

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 68a8966f879486d1815650306993dae263eb89d5..2cdf288993070617f1512803fac6a5cefc315c42 100644
--- a/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
+++ b/chrome/browser/extensions/api/hotword_private/hotword_private_apitest.cc
@@ -89,7 +89,7 @@ class MockAudioHistoryHandler : public HotwordAudioHistoryHandler {
 class MockHotwordService : public HotwordService {
  public:
   explicit MockHotwordService(Profile* profile)
-      : HotwordService(profile), service_available_(true) {};
+      : HotwordService(profile), service_available_(true) {}
   ~MockHotwordService() override {}
 
   bool IsServiceAvailable() override { return service_available_; }
@@ -405,6 +405,41 @@ IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, OnDeleteSpeakerModel) {
   EXPECT_TRUE(listenerNotification.WaitUntilSatisfied());
 }
 
+IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, OnSpeakerModelExists) {
+  extensions::HotwordPrivateEventService::GetFactoryInstance();
+  ExtensionTestMessageListener listener("ready", false);
+  ASSERT_TRUE(
+      LoadExtensionAsComponent(test_data_dir_.AppendASCII(
+          "onSpeakerModelExists")));
+  EXPECT_TRUE(listener.WaitUntilSatisfied());
+
+  service()->OptIntoHotwording(HotwordService::HOTWORD_ONLY);
+
+  ExtensionTestMessageListener listenerNotification("notification", false);
+  EXPECT_TRUE(listenerNotification.WaitUntilSatisfied());
+}
+
+IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, SpeakerModelExistsResult) {
+  EXPECT_FALSE(profile()->GetPrefs()->GetBoolean(
+      prefs::kHotwordAlwaysOnSearchEnabled));
+
+  ExtensionTestMessageListener listenerTrue("ready", false);
+  ASSERT_TRUE(RunComponentExtensionTest(
+      "speakerModelExistsResultTrue")) << message_;
+  EXPECT_TRUE(listenerTrue.WaitUntilSatisfied());
+  EXPECT_TRUE(profile()->GetPrefs()->GetBoolean(
+      prefs::kHotwordAlwaysOnSearchEnabled));
+
+  PrefService* prefs = profile()->GetPrefs();
+  prefs->SetBoolean(prefs::kHotwordAlwaysOnSearchEnabled, false);
+  ExtensionTestMessageListener listenerFalse("ready", false);
+  ASSERT_TRUE(RunComponentExtensionTest(
+      "speakerModelExistsResultFalse")) << message_;
+  EXPECT_TRUE(listenerFalse.WaitUntilSatisfied());
+  EXPECT_FALSE(profile()->GetPrefs()->GetBoolean(
+      prefs::kHotwordAlwaysOnSearchEnabled));
+}
+
 IN_PROC_BROWSER_TEST_F(HotwordPrivateApiTest, Training) {
   EXPECT_FALSE(service()->IsTraining());