Client plugin changes to support third party authentication.

remoting/client/plugin/pepper_token_fetcher.cc

+// 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.
+
+#include "remoting/client/plugin/pepper_token_fetcher.h"
+
+#include "remoting/client/plugin/chromoting_instance.h"
+
+namespace remoting {
+
+PepperTokenFetcher::PepperTokenFetcher(base::WeakPtr<ChromotingInstance> plugin,
+                                       const std::string& host_public_key)
+    : plugin_(plugin),
+      host_public_key_(host_public_key),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
+}
+
+PepperTokenFetcher::~PepperTokenFetcher() {
+}
+
+void PepperTokenFetcher::FetchThirdPartyToken(
+    const GURL& token_url,
+    const std::string& scope,
+    const TokenFetchedCallback& token_fetched_callback) {
+  if (plugin_) {
+    token_fetched_callback_ = token_fetched_callback;
+    plugin_->FetchThirdPartyToken(token_url, host_public_key_, scope,
+                                  weak_factory_.GetWeakPtr());
+  }
+}
+
+void PepperTokenFetcher::OnTokenFetched(
+    const std::string& token, const std::string& shared_secret) {
+  if (!token_fetched_callback_.is_null()) {
+    token_fetched_callback_.Run(token, shared_secret);
+    token_fetched_callback_.Reset();
+  }
+}
+
+}  // namespace remoting