Create a content::ResourceContext.

content/browser/resource_context.h

Index: content/browser/resource_context.h
diff --git a/content/browser/resource_context.h b/content/browser/resource_context.h
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+++ b/content/browser/resource_context.h
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+// 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.
+
+#ifndef CONTENT_BROWSER_RESOURCE_CONTEXT_H_
+#define CONTENT_BROWSER_RESOURCE_CONTEXT_H_
+
+#include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
+
+namespace webkit_database {
+class DatabaseTracker;
+}  // namespace webkit_database
+
+namespace content {
+
+// ResourceContext contains the relevant context information required for
+// resource loading. It lives on the IO thread, although it is constructed on
+// the UI thread. ResourceContext doesn't own anything it points to, it just
+// holds pointers to relevant objects to resource loading.
+class ResourceContext {
+ public:
+  virtual ~ResourceContext();
+
+  webkit_database::DatabaseTracker* database_tracker() const;
+  void set_database_tracker(webkit_database::DatabaseTracker* tracker);
+
+ protected:
+  ResourceContext();
+
+ private:
+  virtual void EnsureInitialized() const = 0;
+
+  webkit_database::DatabaseTracker* database_tracker_;
+
+  DISALLOW_COPY_AND_ASSIGN(ResourceContext);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RESOURCE_CONTEXT_H_