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

ppapi/cpp/dev/resource_array_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_RESOURCE_ARRAY_DEV_H_
 #define PPAPI_CPP_DEV_RESOURCE_ARRAY_DEV_H_
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/cpp/resource.h"
 
 namespace pp {
 
-class Instance;
+class InstanceHandle;
 
 class ResourceArray_Dev : public Resource {
  public:
   ResourceArray_Dev();
 
-  struct PassRef {};
-
   ResourceArray_Dev(PassRef, PP_Resource resource);
 
   ResourceArray_Dev(const ResourceArray_Dev& other);
 
-  ResourceArray_Dev(Instance* instance,
+  ResourceArray_Dev(const InstanceHandle& instance,
                     const PP_Resource elements[],
                     uint32_t size);
 
   virtual ~ResourceArray_Dev();
 
   ResourceArray_Dev& operator=(const ResourceArray_Dev& other);
 
   uint32_t size() const;
 
   PP_Resource operator[](uint32_t index) const;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_RESOURCE_ARRAY_DEV_H_