Add 'Dump Database' tab to syncfs-internals (only for v2 for now)

chrome/browser/sync_file_system/remote_file_sync_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_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 174 matching lines @@
   // returned by the last OnRemoteServiceStateUpdated notification.
   virtual RemoteServiceState GetCurrentState() const = 0;
 
   // Returns all origins along with an arbitrary string description of their
   // corresponding sync statuses.
   virtual void GetOriginStatusMap(OriginStatusMap* status_map) = 0;
 
   // Returns file metadata for |origin|.
   virtual scoped_ptr<base::ListValue> DumpFiles(const GURL& origin) = 0;
 
+  // Returns the dump of internal database.
+  virtual scoped_ptr<base::ListValue> DumpDatabase() = 0;
+
   // Enables or disables the background sync.
   // Setting this to false should disable the synchronization (and make
   // the service state to REMOTE_SERVICE_DISABLED), while setting this to
   // true does not necessarily mean the service is actually turned on
   // (for example if Chrome is offline the service state will become
   // REMOTE_SERVICE_TEMPORARY_UNAVAILABLE).
   virtual void SetSyncEnabled(bool enabled) = 0;
 
   // Sets the conflict resolution policy. Returns SYNC_STATUS_OK on success,
   // or returns an error code if the given policy is not supported or had
@@ skipping 17 matching lines @@
       const std::string& id,
       const DownloadVersionCallback& callback) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RemoteFileSyncService);
 };
 
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_REMOTE_FILE_SYNC_SERVICE_H_