[Android] Rewrite old-style NTP URLs to new-style URLs.

chrome/browser/android/new_tab_page_url_handler.h

+// Copyright 2014 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 CHROME_BROWSER_ANDROID_NEW_TAB_PAGE_URL_HANDLER_H_
+#define CHROME_BROWSER_ANDROID_NEW_TAB_PAGE_URL_HANDLER_H_
+
+class GURL;
+
+namespace content {
+class BrowserContext;
+}
+
+namespace chrome {
+namespace android {
+
+// Rewrites old-style Android NTP URLs to new-style NTP URLs:
+//  - chrome://newtab              -> chrome-native://newtab
+//  - chrome://newtab#most_visited -> chrome-native://newtab
+//  - chrome://newtab#incognito    -> chrome-native://newtab
+//  - chrome://newtab#bookmarks    -> chrome-native://bookmarks
+//  - chrome://newtab#bookmarks:99 -> chrome-native://bookmarks
+//  - chrome://newtab#open_tabs    -> chrome-native://recent-tabs
+//  - chrome-native://recent_tabs  -> chrome-native://recent-tabs
+//
+// TODO(newt): Once most users have upgraded past M34, simplify this down to a
+// single rule: chrome://newtab -> chrome-native://newtab
+bool HandleAndroidNewTabURL(GURL* url,
+                            content::BrowserContext* browser_context);
+
+}  // namespace android
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_ANDROID_NEW_TAB_PAGE_URL_HANDLER_H_