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

chrome/browser/ui/webui/sync_file_system_internals/dump_database_handler.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/ui/webui/sync_file_system_internals/dump_database_handler.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/sync_file_system/sync_file_system_service.h"
+#include "chrome/browser/sync_file_system/sync_file_system_service_factory.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_data_source.h"
+
+using sync_file_system::SyncFileSystemServiceFactory;
+
+namespace syncfs_internals {
+
+DumpDatabaseHandler::DumpDatabaseHandler(Profile* profile)
+    : profile_(profile) {}
+DumpDatabaseHandler::~DumpDatabaseHandler() {}
+
+void DumpDatabaseHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "getDatabaseDump",
+      base::Bind(&DumpDatabaseHandler::GetDatabaseDump,
+                 base::Unretained(this)));
+}
+
+void DumpDatabaseHandler::GetDatabaseDump(const base::ListValue* args) {
+  scoped_ptr<base::ListValue> list =
+      SyncFileSystemServiceFactory::GetForProfile(profile_)->DumpDatabase();
+  web_ui()->CallJavascriptFunction("DumpDatabase.onGetDatabaseDump",
+                                   *list.get());
+}
+
+}  // namespace syncfs_internals