WebSocket Pepper API: allow to release in completion callbacks

webkit/plugins/ppapi/ppb_websocket_impl.h

Index: webkit/plugins/ppapi/ppb_websocket_impl.h
diff --git a/webkit/plugins/ppapi/ppb_websocket_impl.h b/webkit/plugins/ppapi/ppb_websocket_impl.h
index 0bdaf4b71785022400b7b6941f71f1c4adef0b4b..6b494de78cdf7c8e3ff4e10a10f0401592064dac 100644
--- a/webkit/plugins/ppapi/ppb_websocket_impl.h
+++ b/webkit/plugins/ppapi/ppb_websocket_impl.h
@@ -9,6 +9,7 @@
 
 #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"
@@ -27,7 +28,8 @@ namespace ppapi {
 // 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();