Add a testing switch to override the query for other forms of browsing history

components/browsing_data_ui/history_notice_utils.cc

 // Copyright 2016 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 "components/browsing_data_ui/history_notice_utils.h"
 
 #include "base/callback.h"
+#include "base/command_line.h"
 #include "components/browser_sync/browser/profile_sync_service.h"
 #include "components/history/core/browser/web_history_service.h"
 
 namespace browsing_data_ui {
 
+namespace switches {
+
+const char kOverrideOtherFormsOfBrowsingHistoryQuery[] =
+    "override-other-forms-of-browsing-history-query";
+
+}
+
 void ShouldShowNoticeAboutOtherFormsOfBrowsingHistory(
     const ProfileSyncService* sync_service,
     history::WebHistoryService* history_service,
     base::Callback<void(bool)> callback) {
+  bool override_other_forms_of_browsing_history_query =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kOverrideOtherFormsOfBrowsingHistoryQuery);
+
   if (!sync_service ||
       !sync_service->IsSyncActive() ||
       sync_service->IsUsingSecondaryPassphrase() ||
       !history_service ||
-      !history_service->HasOtherFormsOfBrowsingHistory()) {
+      (!override_other_forms_of_browsing_history_query &&
+       !history_service->HasOtherFormsOfBrowsingHistory())) {
     callback.Run(false);
     return;
   }
 
   history_service->QueryWebAndAppActivity(callback);
 }
 
 void ShouldPopupDialogAboutOtherFormsOfBrowsingHistory(
     const ProfileSyncService* sync_service,
     history::WebHistoryService* history_service,
     base::Callback<void(bool)> callback) {
   ShouldShowNoticeAboutOtherFormsOfBrowsingHistory(
       sync_service, history_service, callback);
 }
 
 }  // namespace browsing_data_ui