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

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

 // 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.
 
 #include "chrome/browser/sync_file_system/drive_backend/sync_engine.h"
 
 #include "base/bind.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/values.h"
 #include "chrome/browser/drive/drive_api_service.h"
@@ skipping 221 matching lines @@
         metadata_database_->IsAppEnabled(app_id) ? "Enabled" : "Disabled";
   }
 }
 
 scoped_ptr<base::ListValue> SyncEngine::DumpFiles(const GURL& origin) {
   if (!metadata_database_)
     return scoped_ptr<base::ListValue>();
   return metadata_database_->DumpFiles(origin.host());
 }
 
+scoped_ptr<base::ListValue> SyncEngine::DumpDatabase() {
+  if (!metadata_database_)
+    return scoped_ptr<base::ListValue>();
+  return metadata_database_->DumpDatabase();
+}
+
 void SyncEngine::SetSyncEnabled(bool enabled) {
   if (sync_enabled_ == enabled)
     return;
 
   RemoteServiceState old_state = GetCurrentState();
   sync_enabled_ = enabled;
   if (old_state == GetCurrentState())
     return;
 
   const char* status_message = enabled ? "Sync is enabled" : "Sync is disabled";
@@ skipping 344 matching lines @@
         tracker.tracker_kind() == TRACKER_KIND_APP_ROOT;
     if (is_app_enabled && !is_app_root_tracker_enabled)
       EnableOrigin(origin, base::Bind(&EmptyStatusCallback));
     else if (!is_app_enabled && is_app_root_tracker_enabled)
       DisableOrigin(origin, base::Bind(&EmptyStatusCallback));
   }
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system