Client plugin changes to support third party authentication.

remoting/client/plugin/pepper_token_fetcher.h

+// Copyright 2013 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 REMOTING_CLIENT_PLUGIN_PEPPER_TOKEN_FETCHER_H_
+#define REMOTING_CLIENT_PLUGIN_PEPPER_TOKEN_FETCHER_H_
+
+#include "base/callback.h"
+#include "base/memory/weak_ptr.h"
+#include "remoting/protocol/third_party_client_authenticator.h"
+
+namespace remoting {
+
+class ChromotingInstance;
+
+class PepperTokenFetcher
+    : public protocol::ThirdPartyClientAuthenticator::TokenFetcher {
+ public:
+  PepperTokenFetcher(base::WeakPtr<ChromotingInstance> plugin,
+                     const std::string& host_public_key);
+  virtual ~PepperTokenFetcher();
+
+  // protocol::TokenClientAuthenticator::TokenFetcher interface.
+  virtual void FetchThirdPartyToken(
+      const GURL& token_url,
+      const std::string& scope,
+      const TokenFetchedCallback& token_fetched_callback) OVERRIDE;
+
+  // Called by ChromotingInstance when the webapp finishes fetching the token.
+  void OnTokenFetched(const std::string& token,
+                      const std::string& shared_secret);
+
+ private:
+  base::WeakPtr<ChromotingInstance> plugin_;
+  std::string host_public_key_;
+  TokenFetchedCallback token_fetched_callback_;
+  base::WeakPtrFactory<PepperTokenFetcher> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperTokenFetcher);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_PLUGIN_PEPPER_TOKEN_FETCHER_H_