WebSocket Pepper API: allow to release in completion callbacks

webkit/plugins/ppapi/ppb_websocket_impl.h

 // Copyright (c) 2012 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_PPB_WEBSOCKET_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_WEBSOCKET_IMPL_H_
 
 #include <queue>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/thunk/ppb_websocket_api.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSocket.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSocketClient.h"
 
 namespace ppapi {
 class StringVar;
 class Var;
 }  // namespace ppapi
 
 namespace webkit {
 namespace ppapi {
 
 // All implementation is in this class for now. We should move some common
 // implementation to shared_impl when we implement proxy interfaces.
 class PPB_WebSocket_Impl : public ::ppapi::Resource,
                            public ::ppapi::thunk::PPB_WebSocket_API,
-                           public ::WebKit::WebSocketClient {
+                           public ::WebKit::WebSocketClient,
+                           public ::base::SupportsWeakPtr<PPB_WebSocket_Impl> {
  public:
   explicit PPB_WebSocket_Impl(PP_Instance instance);
   virtual ~PPB_WebSocket_Impl();
 
   static PP_Resource Create(PP_Instance instance);
 
   // Resource overrides.
   // Returns the pointer to the thunk::PPB_WebSocket_API if it's supported.
   virtual ::ppapi::thunk::PPB_WebSocket_API* AsPPB_WebSocket_API() OVERRIDE;
 
@@ skipping 105 matching lines @@
   // specification. The calculated value can be read via GetBufferedAmount().
   uint64_t buffered_amount_after_close_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_WebSocket_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_WEBSOCKET_IMPL_H_