Promote BookmarkService to a public API.

chrome/browser/bookmarks/bookmark_service.h

-// Copyright (c) 2012 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_BOOKMARKS_BOOKMARK_SERVICE_H_
-#define CHROME_BROWSER_BOOKMARKS_BOOKMARK_SERVICE_H_
-
-#include <vector>
-
-#include "base/string16.h"
-#include "googleurl/src/gurl.h"
-
-// BookmarkService provides a thread safe view of bookmarks. It is used by
-// HistoryBackend when it needs to determine the set of bookmarked URLs
-// or if a URL is bookmarked.
-//
-// BookmarkService is owned by Profile and deleted when the Profile is deleted.
-class BookmarkService {
- public:
-  struct URLAndTitle {
-    GURL url;
-    string16 title;
-  };
-
-  // Returns true if the specified URL is bookmarked.
-  //
-  // If not on the main thread you *must* invoke BlockTillLoaded first.
-  virtual bool IsBookmarked(const GURL& url) = 0;
-
-  // Returns, by reference in |bookmarks|, the set of bookmarked urls and their
-  // titles. This returns the unique set of URLs. For example, if two bookmarks
-  // reference the same URL only one entry is added not matter the titles are
-  // same or not.
-  //
-  // If not on the main thread you *must* invoke BlockTillLoaded first.
-  virtual void GetBookmarks(std::vector<URLAndTitle>* bookmarks) = 0;
-
-  // Blocks until loaded. This is intended for usage on a thread other than
-  // the main thread.
-  virtual void BlockTillLoaded() = 0;
-
- protected:
-  virtual ~BookmarkService() {}
-};
-
-#endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_SERVICE_H_