Hide experimental app list Google logo and custom launcher page when search engine is not Google.

chrome/browser/ui/app_list/start_page_service.cc

Index: chrome/browser/ui/app_list/start_page_service.cc
diff --git a/chrome/browser/ui/app_list/start_page_service.cc b/chrome/browser/ui/app_list/start_page_service.cc
index c65a3e03a34990a4c1c607e69e34715d0100894b..817a3ff260213ddf4bb9aa6d0b40f77ac447cbf4 100644
--- a/chrome/browser/ui/app_list/start_page_service.cc
+++ b/chrome/browser/ui/app_list/start_page_service.cc
@@ -19,6 +19,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/hotword_service.h"
 #include "chrome/browser/search/hotword_service_factory.h"
+#include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/search_engines/ui_thread_search_terms_data.h"
 #include "chrome/browser/ui/app_list/speech_auth_helper.h"
 #include "chrome/browser/ui/app_list/speech_recognizer.h"
@@ -30,6 +31,8 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
+#include "components/search_engines/template_url_prepopulate_data.h"
+#include "components/search_engines/template_url_service.h"
 #include "components/ui/zoom/zoom_controller.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_details.h"
@@ -279,10 +282,20 @@ StartPageService::StartPageService(Profile* profile)
   if (app_list::switches::IsExperimentalAppListEnabled())
     LoadContents();
 
+  TemplateURLService* template_url_service =
+      TemplateURLServiceFactory::GetForProfile(profile_);
+  if (template_url_service)
+    template_url_service->AddObserver(this);
+
   network_change_observer_.reset(new NetworkChangeObserver(this));
 }
 
-StartPageService::~StartPageService() {}
+StartPageService::~StartPageService() {
+  TemplateURLService* template_url_service =
+      TemplateURLServiceFactory::GetForProfile(profile_);
+  if (template_url_service)
+    template_url_service->RemoveObserver(this);
+}
 
 void StartPageService::AddObserver(StartPageObserver* observer) {
   observers_.AddObserver(observer);
@@ -494,6 +507,24 @@ void StartPageService::GetSpeechAuthParameters(std::string* auth_scope,
   }
 }
 
+void StartPageService::OnTemplateURLServiceChanged() {
+  TemplateURLService* template_url_service =
+      TemplateURLServiceFactory::GetForProfile(profile_);
+  const TemplateURL* default_provider =
+      template_url_service->GetDefaultSearchProvider();
+  bool is_google =
+      TemplateURLPrepopulateData::GetEngineType(
+          *default_provider, template_url_service->search_terms_data()) ==
+      SEARCH_ENGINE_GOOGLE;
+
+  contents_->GetWebUI()->CallJavascriptFunction(
+      "appList.startPage.onSearchEngineChanged",
+      base::FundamentalValue(is_google));
+
+  if (is_google)
+    FetchDoodleJson();
+}
+
 void StartPageService::Shutdown() {
   UnloadContents();
 #if defined(OS_CHROMEOS)
@@ -531,7 +562,7 @@ void StartPageService::WebUILoaded() {
     cb.Run();
   pending_webui_callbacks_.clear();
 
-  FetchDoodleJson();
+  OnTemplateURLServiceChanged();
 }
 
 void StartPageService::LoadContents() {