[Hotword] Ok Google options disappear if search provider is changed from

chrome/browser/ui/webui/options/browser_options_handler.cc

Index: chrome/browser/ui/webui/options/browser_options_handler.cc
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.cc b/chrome/browser/ui/webui/options/browser_options_handler.cc
index d7c47ca2c4986ee9904f4989f91bc0b9fc5ea158..6ddfc3fd80b2b8fce024f7525c06280865528750 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.cc
+++ b/chrome/browser/ui/webui/options/browser_options_handler.cc
@@ -1205,6 +1205,22 @@ void BrowserOptionsHandler::OnTemplateURLServiceChanged() {
           template_url_service_->is_default_search_managed() ||
           template_url_service_->IsExtensionControlledDefaultSearch()));
 
+  if (default_index != -1 && model_urls[default_index]->HasGoogleBaseURLs(
+          template_url_service_->search_terms_data())) {
+    // If the user has chosen Google as the default search provider, make
+    // hotwording as an option available again.
+    HandleRequestHotwordAvailable(nullptr);
+  } else {
+    // If the user has chosen a default search provide other than Google, turn
+    // off hotwording since other providers don't provide that functionality.
+    web_ui()->CallJavascriptFunction("BrowserOptions.setHotwordSectionVisible",
+                                     base::FundamentalValue(false));
+    HotwordService* hotword_service =
+        HotwordServiceFactory::GetForProfile(Profile::FromWebUI(web_ui()));
+    if (hotword_service)
+      hotword_service->DisableHotwordPreferences();
+  }
+
   SetupExtensionControlledIndicators();
 }