drive: Recover cache entries from trashed DB to filter out non-dirty cache files

chrome/browser/chromeos/drive/file_cache.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_CHROMEOS_DRIVE_FILE_CACHE_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_CACHE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 139 matching lines @@
   // Initializes the cache. Returns true on success.
   bool Initialize();
 
   // Destroys this cache. This function posts a task to the blocking task
   // runner to safely delete the object.
   // Must be called on the UI thread.
   void Destroy();
 
   // Moves files in the cache directory which are not manged by FileCache to
   // |dest_directory|.
-  bool RecoverFilesFromCacheDirectory(const base::FilePath& dest_directory);
+  // |recovered_cache_entries| should contain cache entries recovered from the
+  // trashed metadata DB. It is used to ignore non-dirty files.
+  bool RecoverFilesFromCacheDirectory(
+      const base::FilePath& dest_directory,
+      const std::map<std::string, FileCacheEntry>& recovered_cache_entries);
 
  private:
   friend class FileCacheTest;
   friend class FileCacheTestOnUIThread;
 
   ~FileCache();
 
   // Returns absolute path of the file if it were cached or to be cached.
   //
   // Can be called on any thread.
@@ skipping 47 matching lines @@
 // this value.
 //
 // Copied from cryptohome/homedirs.h.
 // TODO(satorux): Share the constant.
 const int64 kMinFreeSpace = 512 * 1LL << 20;
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_CACHE_H_