Add a JavaScript dialog tab helper.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 1483086b6b6a9d376179aaaec451182febddf6d5..fd525b7866cc3953a1a958303ad770a03c650f5a 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -122,6 +122,7 @@
 #include "chrome/browser/ui/global_error/global_error.h"
 #include "chrome/browser/ui/global_error/global_error_service.h"
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
+#include "chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.h"
 #include "chrome/browser/ui/location_bar/location_bar.h"
 #include "chrome/browser/ui/media_utils.h"
 #include "chrome/browser/ui/search/search_delegate.h"
@@ -156,7 +157,6 @@
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/grit/locale_settings.h"
-#include "components/app_modal/javascript_dialog_manager.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/browser/bookmark_utils.h"
 #include "components/bookmarks/common/bookmark_pref_names.h"
@@ -1639,7 +1639,7 @@ void Browser::DidNavigateMainFramePostCommit(WebContents* web_contents) {
 
 content::JavaScriptDialogManager* Browser::GetJavaScriptDialogManager(
     WebContents* source) {
-  return app_modal::JavaScriptDialogManager::GetInstance();
+  return JavaScriptDialogTabHelper::FromWebContents(source);
 }
 
 content::ColorChooser* Browser::OpenColorChooser(