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

components/history_notice_utils/history_notice_utils.h

Index: components/history_notice_utils/history_notice_utils.h
diff --git a/components/history_notice_utils/history_notice_utils.h b/components/history_notice_utils/history_notice_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..30e9966522cc79d74b2efaa437f9204c1e345b5f
--- /dev/null
+++ b/components/history_notice_utils/history_notice_utils.h
@@ -0,0 +1,24 @@
+// 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.
+
+#ifndef COMPONENTS_HISTORY_NOTICE_UTILS_HISTORY_NOTICE_UTILS_H_
+#define COMPONENTS_HISTORY_NOTICE_UTILS_HISTORY_NOTICE_UTILS_H_
+

[sdefresne, 2016/03/17 13:11:20]

nit: the order in other files seems to be forward-declaration (sorted) in global
namespace, then forward-declaration (sorted) in other namespace (sorted).

[msramek, 2016/03/17 13:58:20]

Done.

+namespace history {
+class WebHistoryService;
+}
+
+class ProfileSyncService;
+
+namespace history_notice_utils {
+
+// Whether the Clear Browsing Data UI should show a notice about the existence
+// of other forms of browsing history stored in user's account.
+bool ShouldShowNoticeAboutOtherFormsOfBrowsingHistory(
+    const ProfileSyncService* sync_service,
+    const history::WebHistoryService* history_service);
+
+}  // namespace history_notice_utils
+
+#endif  // COMPONENTS_HISTORY_NOTICE_UTILS_HISTORY_NOTICE_UTILS_H_