Precache tracking database

chrome/browser/history/most_visited_urls_provider.h

+// Copyright 2013 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_HISTORY_MOST_VISITED_URLS_PROVIDER_H_
+#define CHROME_BROWSER_HISTORY_MOST_VISITED_URLS_PROVIDER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "components/precache/core/url_list_provider.h"
+
+namespace history {
+
+class TopSites;
+
+// A URLListProvider that provides a list of the user's most visited URLs.
+class MostVisitedURLsProvider : public precache::URLListProvider {

[sky, 2013/10/28 23:14:16]

Is there a particular reason to put this in chrome/browser/history rather than
some where in the precache code?

[sclittle, 2013/10/29 07:16:05]

Good point, it doesn't really have any purpose outside of the precache code. It
can't be in the component, since layered components aren't allowed to depend on
chrome/, and this uses TopSites, so I've moved it to a new directory
chrome/browser/precache.

+ public:
+  explicit MostVisitedURLsProvider(TopSites* top_sites);
+  ~MostVisitedURLsProvider();
+
+  // Returns a list of the user's most visited URLs via a callback. May be
+  // called from any thread.
+  virtual void GetURLs(const GetURLsCallback& callback) OVERRIDE;
+
+ private:
+  scoped_refptr<TopSites> top_sites_;
+
+  DISALLOW_COPY_AND_ASSIGN(MostVisitedURLsProvider);
+};
+
+}  // namespace history
+
+#endif  // CHROME_BROWSER_HISTORY_MOST_VISITED_URLS_PROVIDER_H_