Implement SyncEngine::DumpFiles()

chrome/browser/sync_file_system/drive_backend/metadata_database.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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
+#include "base/values.h"
 #include "chrome/browser/sync_file_system/drive_backend/tracker_set.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 #include "chrome/browser/sync_file_system/sync_status_code.h"
 
 namespace base {
 class FilePath;
 class SequencedTaskRunner;
 class SingleThreadTaskRunner;
 }
 
@@ skipping 92 matching lines @@
   // The entry point of the MetadataDatabase for production code.
   static void Create(base::SequencedTaskRunner* task_runner,
                      const base::FilePath& database_path,
                      const CreateCallback& callback);
   ~MetadataDatabase();
 
   int64 GetLargestFetchedChangeID() const;
   int64 GetSyncRootTrackerID() const;
   bool HasSyncRoot() const;
 
+  // Returns all file metadata for the given |app_id|.
+  scoped_ptr<base::ListValue> DumpFiles(const std::string& app_id);
+
   // Gets / updates the largest known change ID.
   // The largest known change ID is on-memory and not persist over restart.
   // This is supposed to use when a task fetches ChangeList in parallel to other
   // operation.  When a task starts fetching paged ChangeList one by one, it
   // should update the largest known change ID on the first round and background
   // remaining fetch job.
   // Then, when other tasks that update FileMetadata by UpdateByFileResource,
   // it should use largest known change ID as the |change_id| that prevents
   // FileMetadata from overwritten by ChangeList.
   // Also if other tasks try to update a remote resource whose change is not yet
@@ skipping 224 matching lines @@
 
   base::WeakPtrFactory<MetadataDatabase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MetadataDatabase);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_METADATA_DATABASE_H_