Create a content::ResourceContext.

content/browser/resource_context.cc

+// Copyright (c) 2011 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 "content/browser/resource_context.h"
+
+#include "base/logging.h"
+#include "content/browser/browser_thread.h"
+#include "webkit/database/database_tracker.h"
+
+namespace content {
+
+ResourceContext::ResourceContext() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+}
+
+ResourceContext::~ResourceContext() {}
+
+webkit_database::DatabaseTracker* ResourceContext::database_tracker() const {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  EnsureInitialized();
+  return database_tracker_;
+}
+
+void ResourceContext::set_database_tracker(
+    webkit_database::DatabaseTracker* database_tracker) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  database_tracker_ = database_tracker;
+}
+
+}  // namespace content