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

chrome/browser/ui/app_list/start_page_service.h

Index: chrome/browser/ui/app_list/start_page_service.h
diff --git a/chrome/browser/ui/app_list/start_page_service.h b/chrome/browser/ui/app_list/start_page_service.h
index 7a7872b1c3e8eb3b058eb86c02d9eaeef8b0d563..23064c4cc93e712c3c46733f830f5bbc2c6b96ef 100644
--- a/chrome/browser/ui/app_list/start_page_service.h
+++ b/chrome/browser/ui/app_list/start_page_service.h
@@ -19,6 +19,7 @@
 #include "base/time/default_clock.h"
 #include "chrome/browser/ui/app_list/speech_recognizer_delegate.h"
 #include "components/keyed_service/core/keyed_service.h"
+#include "components/search_engines/template_url_service_observer.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "net/url_request/url_fetcher_delegate.h"
@@ -51,7 +52,8 @@ class StartPageObserver;
 class StartPageService : public KeyedService,
                          public content::WebContentsObserver,
                          public net::URLFetcherDelegate,
-                         public SpeechRecognizerDelegate {
+                         public SpeechRecognizerDelegate,
+                         public TemplateURLServiceObserver {
  public:
   typedef std::vector<scoped_refptr<const extensions::Extension> >
       ExtensionList;
@@ -88,6 +90,9 @@ class StartPageService : public KeyedService,
   void GetSpeechAuthParameters(std::string* auth_scope,
                                std::string* auth_token) override;
 
+  // Overridden from TemplateURLServiceObserver:
+  void OnTemplateURLServiceChanged() override;
+
  protected:
   // Protected for testing.
   explicit StartPageService(Profile* profile);