Add the copresence component.

components/copresence/rpc/rpc_handler.h

Index: components/copresence/rpc/rpc_handler.h
diff --git a/components/copresence/rpc/rpc_handler.h b/components/copresence/rpc/rpc_handler.h
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index 0000000000000000000000000000000000000000..dee7220ac78045659d7e0c62868a344df22026d7
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+++ b/components/copresence/rpc/rpc_handler.h
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+// Copyright 2014 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 COMPONENTS_COPRESENCE_RPC_RPC_HANDLER_H_
+#define COMPONENTS_COPRESENCE_RPC_RPC_HANDLER_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/copresence/public/copresence_client_delegate.h"
+
+namespace copresence {
+
+class ReportRequest;
+class WhispernetClient;
+
+// This class currently handles all communication with the copresence server.
+// NOTE: This class is a stub.
+class RpcHandler {
+ public:
+  // A callback to indicate whether handler initialization succeeded.
+  typedef base::Callback<void(bool)> SuccessCallback;
+
+  // Constructor. May call the server to register a device,
+  // so completion status is indicated by the SuccessCallback.
+  RpcHandler(CopresenceClientDelegate* delegate,
+             SuccessCallback init_done_callback);
+
+  virtual ~RpcHandler();
+
+  // Send a report request
+  void SendReportRequest(scoped_ptr<copresence::ReportRequest> request);
+  void SendReportRequest(scoped_ptr<copresence::ReportRequest> request,
+                         const std::string& app_id,
+                         const StatusCallback& callback);
+
+  // Report a set of tokens to the server for a given medium.
+  void ReportTokens(copresence::TokenMedium medium,
+                    const std::vector<std::string>& tokens);
+
+  // Create the directive handler and connect it to the whispernet client.
+  void ConnectToWhispernet(WhispernetClient* whispernet_client);
+
+  // Disconnect the directive handler from the whispernet client.
+  void DisconnectFromWhispernet();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(RpcHandler);
+};
+
+}  // namespace copresence
+
+#endif  // COMPONENTS_COPRESENCE_RPC_RPC_HANDLER_H_