[Chromoting] Use ProcessStatsSender in DesktopSessionAgent (desktop process)

remoting/base/constants.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 REMOTING_BASE_CONSTANTS_H_
 #define REMOTING_BASE_CONSTANTS_H_
 
+#include "base/time/time.h"
+
 namespace remoting {
 
 // Namespace used for chromoting XMPP stanzas.
 extern const char kChromotingXmlNamespace[];
 
 // Channel names.
 extern const char kAudioChannelName[];
 extern const char kControlChannelName[];
 extern const char kEventChannelName[];
 extern const char kVideoChannelName[];
 extern const char kVideoStatsChannelNamePrefix[];
 
 // MIME types for the clipboard.
 extern const char kMimeTypeTextUtf8[];
 
 const int kDefaultDpi = 96;
 
+// The default interval for processes to send resource usage to network process.
+extern const base::TimeDelta kDefaultProcessStatsInterval;
+
 }  // namespace remoting
 
 #endif  // REMOTING_BASE_CONSTANTS_H_