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

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/app_list/start_page_service.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/user_metrics.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_piece.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/media/media_stream_infobar_delegate.h"
 #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"
 #include "chrome/browser/ui/app_list/start_page_observer.h"
 #include "chrome/browser/ui/app_list/start_page_service_factory.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #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"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/speech_recognition_session_preamble.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
@@ skipping 229 matching lines @@
   // If experimental hotwording is enabled, then we're always "ready".
   // Transitioning into the "hotword recognizing" state is handled by the
   // hotword extension.
   if (HotwordService::IsExperimentalHotwordingEnabled()) {
     state_ = app_list::SPEECH_RECOGNITION_READY;
   }
 
   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);
 }
 
 void StartPageService::RemoveObserver(StartPageObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void StartPageService::OnMicrophoneChanged(bool available) {
@@ skipping 191 matching lines @@
     if (service &&
         service->IsOptedIntoAudioLogging() &&
         service->IsAlwaysOnEnabled() &&
         !speech_auth_helper_->GetToken().empty()) {
       *auth_scope = speech_auth_helper_->GetScope();
       *auth_token = speech_auth_helper_->GetToken();
     }
   }
 }
 
+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)
   audio_status_.reset();
 #endif
 
   speech_auth_helper_.reset();
   network_change_observer_.reset();
 }
 
@@ skipping 17 matching lines @@
   // There's a race condition between the WebUI loading, and calling its JS
   // functions. Specifically, calling LoadContents() doesn't mean that the page
   // has loaded, but several code paths make this assumption. This function
   // allows us to defer calling JS functions until after the page has finished
   // loading.
   webui_finished_loading_ = true;
   for (const auto& cb : pending_webui_callbacks_)
     cb.Run();
   pending_webui_callbacks_.clear();
 
-  FetchDoodleJson();
+  OnTemplateURLServiceChanged();
 }
 
 void StartPageService::LoadContents() {
   contents_.reset(content::WebContents::Create(
       content::WebContents::CreateParams(profile_)));
   contents_delegate_.reset(new StartPageWebContentsDelegate(profile_));
   contents_->SetDelegate(contents_delegate_.get());
 
   // The ZoomController needs to be created before the web contents is observed
   // by this object. Otherwise it will react to DidNavigateMainFrame after this
@@ skipping 64 matching lines @@
 
   // Check for a new doodle.
   content::BrowserThread::PostDelayedTask(
       content::BrowserThread::UI, FROM_HERE,
       base::Bind(&StartPageService::FetchDoodleJson,
                  weak_factory_.GetWeakPtr()),
       recheck_delay);
 }
 
 }  // namespace app_list