Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/metrics/new_tab_page_uma.h

+// 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 IOS_CHROME_BROWSER_METRICS_NEW_TAB_PAGE_UMA_H_
+#define IOS_CHROME_BROWSER_METRICS_NEW_TAB_PAGE_UMA_H_
+
+#include "ui/base/page_transition_types.h"
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+class GURL;
+
+// This namespace provides various helpers around handling NTP Uma calls.
+namespace new_tab_page_uma {
+
+enum ActionType {
+  ACTION_SEARCHED_USING_OMNIBOX,
+  ACTION_NAVIGATED_TO_GOOGLE_HOMEPAGE,
+  ACTION_NAVIGATED_USING_OMNIBOX,
+  ACTION_OPENED_MOST_VISITED_ENTRY,
+  ACTION_OPENED_RECENTLY_CLOSED_ENTRY,
+  ACTION_OPENED_BOOKMARK,
+  ACTION_OPENED_FOREIGN_SESSION,
+  NUM_ACTION_TYPES,
+};
+
+void RecordAction(ios::ChromeBrowserState* browserState, ActionType action);
+void RecordActionFromOmnibox(ios::ChromeBrowserState* browserState,
+                             const GURL& url,
+                             ui::PageTransition transition);
+}  // namespace new_tab_page_uma
+
+#endif  // IOS_CHROME_BROWSER_METRICS_NEW_TAB_PAGE_UMA_H_