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

ppapi/cpp/websocket.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_WEBSOCKET_H_
 #define PPAPI_CPP_WEBSOCKET_H_
 
 #include "ppapi/c/ppb_websocket.h"
 #include "ppapi/cpp/resource.h"
 
 /// @file
 /// This file defines the WebSocket interface.
 
 namespace pp {
 
 class CompletionCallback;
-class Instance;
+class InstanceHandle;
 class Var;
 
 /// The <code>WebSocket</code> class
 class WebSocket : public Resource {
  public:
   /// Constructs a WebSocket object.
-  WebSocket(Instance* instance);
+  ///
+  /// @param[in] instance The instance with which this resource will be
+  /// associated.
+  explicit WebSocket(const InstanceHandle& instance);
 
   /// Destructs a WebSocket object.
   virtual ~WebSocket();
 
   /// Connect() connects to the specified WebSocket server. Caller can call
   /// this method at most once.
   ///
   /// @param[in] url A <code>Var</code> of string type representing a WebSocket
   /// server URL.
   /// @param[in] protocols A pointer to an array of string type
@@ skipping 141 matching lines @@
   /// GetURL() returns the URL associated with specified WebSocket connection.
   ///
   /// @return Returns a <code>Var</code> of string type. If called before the
   /// connection is established, it contains the empty string.
   Var GetURL();
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_WEBSOCKET_H_