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

ppapi/cpp/url_request_info.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 PPAPI_CPP_URL_REQUEST_INFO_H_
 #define PPAPI_CPP_URL_REQUEST_INFO_H_
 
 #include "ppapi/c/ppb_url_request_info.h"
 #include "ppapi/cpp/resource.h"
 #include "ppapi/cpp/var.h"
 
 /// @file
 /// This file defines the API for creating and manipulating URL requests.
 namespace pp {
 
 class FileRef;
-class Instance;
+class InstanceHandle;
 
 /// URLRequestInfo provides an API for creating and manipulating URL requests.
 class URLRequestInfo : public Resource {
  public:
   /// Default constructor. This constructor creates an
   /// <code>is_null</code> resource.
   URLRequestInfo() {}
 
   /// A constructor used to allocate a new <code>URLLoader</code> in the
   /// browser. The resulting object will be <code>is_null</code> if the
   /// allocation failed.
   ///
-  /// @param[in] instance An <code>Instance</code>.
-  explicit URLRequestInfo(Instance* instance);
+  /// @param[in] instance The instance with which this resource will be
+  /// associated.
+  explicit URLRequestInfo(const InstanceHandle& instance);
 
   /// The copy constructor for <code>URLRequestInfo</code>.
   ///
   /// @param[in] other A <code>URLRequestInfo</code> to be copied.
   URLRequestInfo(const URLRequestInfo& other);
 
   /// SetProperty() sets a request property. The value of the property must be
   /// the correct type according to the property being set.
   ///
   /// @param[in] property A <code>PP_URLRequestProperty</code> identifying the
@@ skipping 264 matching lines @@
   /// @return true if successful, false if the parameter is invalid.
   bool SetPrefetchBufferLowerThreshold(int32_t size) {
     return SetProperty(PP_URLREQUESTPROPERTY_PREFETCHBUFFERLOWERTHRESHOLD,
                        size);
   }
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_URL_REQUEST_INFO_H_