Implement chrome.experimental.downloads.search()

content/browser/download/download_manager.h

 // Copyright (c) 2011 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.
 //
 // The DownloadManager object manages the process of downloading, including
 // updates to the history system and providing the information for displaying
 // the downloads view in the Destinations tab. There is one DownloadManager per
 // active browser context in Chrome.
 //
 // Download observers:
@@ skipping 45 matching lines @@
 class DownloadManagerDelegate;
 class DownloadStatusUpdater;
 class GURL;
 class ResourceDispatcherHost;
 class TabContents;
 struct DownloadCreateInfo;
 struct DownloadSaveInfo;
 
 namespace content {
 class BrowserContext;
-}
+}  // namespace content

[cbentzel, 2011/10/20 18:18:53]

Nit: end namespaces not needed for forward declaration cases. 

+
+namespace download_util {
+class DownloadQuery;
+}  // namespace download_util
 
 // Browser's download manager: manages all downloads and destination view.
 class CONTENT_EXPORT DownloadManager
     : public base::RefCountedThreadSafe<DownloadManager,
                                         BrowserThread::DeleteOnUIThread>,
       public DownloadStatusUpdaterDelegate {
  public:
   DownloadManager(DownloadManagerDelegate* delegate,
                   DownloadStatusUpdater* status_updater);
 
@@ skipping 23 matching lines @@
 
   typedef std::vector<DownloadItem*> DownloadVector;
 
   // Return all temporary downloads that reside in the specified directory.
   void GetTemporaryDownloads(const FilePath& dir_path, DownloadVector* result);
 
   // Return all non-temporary downloads in the specified directory that are
   // are in progress or have completed.
   void GetAllDownloads(const FilePath& dir_path, DownloadVector* result);
 
+  // Fill |results| with the items that match |query|.
+  void Search(const download_util::DownloadQuery& query,
+              DownloadVector* results) const;
+
   // Returns all non-temporary downloads matching |query|. Empty query matches
   // everything.
   void SearchDownloads(const string16& query, DownloadVector* result);
 
   // Returns the next download id in a DownloadId and increments the counter.
   // May be called on any thread. The incremented counter is not persisted, but
   // the base counter for this accessor is initialized from the largest id
   // actually saved to the download history database.
   DownloadId GetNextId();
 
@@ skipping 314 matching lines @@
   DownloadManagerDelegate* delegate_;
 
   // TODO(rdsmith): Remove when http://crbug.com/85408 is fixed.
   // For debugging only.
   int64 largest_db_handle_in_history_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManager);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_H_