Convert resources to take an instance key instead of an Instance*.

ppapi/cpp/dev/video_decoder_client_dev.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 PPAPI_CPP_DEV_VIDEO_DECODER_CLIENT_DEV_H_
 #define PPAPI_CPP_DEV_VIDEO_DECODER_CLIENT_DEV_H_
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/dev/pp_video_dev.h"
+#include "ppapi/cpp/instance_handle.h"
 
 namespace pp {
 
-class Instance;
 class VideoDecoder_Dev;
 
 // This class provides a C++ interface for callbacks related to video decoding.
 // It is the C++ counterpart to PPP_VideoDecoder_Dev.
 // You would normally use multiple inheritance to derive from this class in your
 // instance.
 class VideoDecoderClient_Dev {
  public:
-  VideoDecoderClient_Dev(Instance* instance);
+  VideoDecoderClient_Dev(const InstanceHandle& instance);
   virtual ~VideoDecoderClient_Dev();
 
   // Callback to provide buffers for the decoded output pictures.
   virtual void ProvidePictureBuffers(PP_Resource decoder,
                                      uint32_t req_num_of_bufs,
                                      const PP_Size& dimensions) = 0;
 
   // Callback for decoder to deliver unneeded picture buffers back to the
   // plugin.
   virtual void DismissPictureBuffer(PP_Resource decoder,
                                     int32_t picture_buffer_id) = 0;
 
   // Callback to deliver decoded pictures ready to be displayed.
   virtual void PictureReady(PP_Resource decoder,
                             const PP_Picture_Dev& picture) = 0;
 
   // Callback to notify about decoding errors.
   virtual void NotifyError(PP_Resource decoder,
                            PP_VideoDecodeError_Dev error) = 0;
 
  private:
-  Instance* associated_instance_;
+  InstanceHandle associated_instance_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_VIDEO_DECODER_CLIENT_DEV_H_