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..6b4e4e811cf97fbf344b075e965b3ca65716b963 100644
--- a/chrome/browser/ui/app_list/start_page_service.cc
+++ b/chrome/browser/ui/app_list/start_page_service.cc
@@ -268,6 +268,7 @@ StartPageService::StartPageService(Profile* profile)
       speech_auth_helper_(new SpeechAuthHelper(profile, &clock_)),
       network_available_(true),
       microphone_available_(true),
+      doodle_enabled_(true),
       weak_factory_(this) {
   // If experimental hotwording is enabled, then we're always "ready".
   // Transitioning into the "hotword recognizing" state is handled by the
@@ -282,7 +283,8 @@ StartPageService::StartPageService(Profile* profile)
   network_change_observer_.reset(new NetworkChangeObserver(this));
 }
 
-StartPageService::~StartPageService() {}
+StartPageService::~StartPageService() {
+}
 
 void StartPageService::AddObserver(StartPageObserver* observer) {
   observers_.AddObserver(observer);
@@ -559,6 +561,9 @@ void StartPageService::UnloadContents() {
 }
 
 void StartPageService::FetchDoodleJson() {
+  if (!doodle_enabled_)
+    return;
+
   GURL::Replacements replacements;
   replacements.SetPathStr(kDoodleJsonPath);