Remove webkit::ppapi::Resource.

webkit/plugins/ppapi/resource_helper.h

+// 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 WEBKIT_PLUGINS_PPAPI_RESOURCE_HELPER_H_
+#define WEBKIT_PLUGINS_PPAPI_RESOURCE_HELPER_H_
+
+#include "base/basictypes.h"
+#include "ppapi/c/pp_resource.h"
+
+namespace ppapi {
+class Resource;
+}
+
+namespace webkit {
+namespace ppapi {
+
+class PluginInstance;
+class PluginModule;
+class PluginDelegate;
+
+// Helper functions for Resoruce implementations.
+//
+// This is specifically not designed to be a base class that derives from
+// ppapi::Resource to avoid diamond inheritance if most of a resource class
+// is implemented in the shared_impl (to share code with the proxy).
+class ResourceHelper {
+ public:
+  // Returns the instance implementation object for the given resource, or NULL
+  // if the resource has outlived its instance.
+  static PluginInstance* GetPluginInstance(const ::ppapi::Resource* resource);
+
+  // Returns the module for the given resource, or NULL if the resource has
+  // outlived its instance.
+  static PluginModule* GetPluginModule(const ::ppapi::Resource* resource);
+
+  // Returns the plugin delegate for the given resource, or NULL if the
+  // resource has outlived its instance.
+  static PluginDelegate* GetPluginDelegate(const ::ppapi::Resource* resource);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(ResourceHelper);
+};
+
+}  // namespace ppapi
+}  // namespace webkit
+
+#endif  // WEBKIT_PLUGINS_PPAPI_RESOURCE_IMPL_HELPER_H_