Add an infrastructure to query history.google.com about other forms of browsing history.

components/history_notice_utils/history_notice_utils.cc

Index: components/history_notice_utils/history_notice_utils.cc
diff --git a/components/history_notice_utils/history_notice_utils.cc b/components/history_notice_utils/history_notice_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..21588b7b3d7cf0f7be588a32b8b78045f2f774b4
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+++ b/components/history_notice_utils/history_notice_utils.cc
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+// 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/history_notice_utils/history_notice_utils.h"
+
+#include "components/browser_sync/browser/profile_sync_service.h"
+#include "components/history/core/browser/web_history_service.h"
+
+namespace history_notice_utils {
+
+bool ShouldShowNoticeAboutOtherFormsOfBrowsingHistory(
+    const ProfileSyncService* sync_service,
+    const history::WebHistoryService* history_service) {
+  return sync_service &&
+         sync_service->IsUsingSecondaryPassphrase() &&
+         history_service &&
+         history_service->HasOtherFormsOfBrowsingHistory();
+}
+
+}  // namespace history_notice_utils