Adding support for Win+L key combo in Windows host.

remoting/host/desktop_process.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_HOST_DESKTOP_PROCESS_H_
 #define REMOTING_HOST_DESKTOP_PROCESS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 33 matching lines @@
   void OnNetworkProcessDisconnected() override;
 
   // IPC::Listener implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
   void OnChannelConnected(int32_t peer_pid) override;
   void OnChannelError() override;
 
   // Injects Secure Attention Sequence.
   void InjectSas();
 
+  // Locks the workstation for the current session.
+  void LockWorkStation();
+
   // Creates the desktop agent and required threads and IPC channels. Returns
   // true on success.
   bool Start(
       std::unique_ptr<DesktopEnvironmentFactory> desktop_environment_factory);
 
  private:
   // Crashes the process in response to a daemon's request. The daemon passes
   // the location of the code that detected the fatal error resulted in this
   // request. See the declaration of ChromotingDaemonMsg_Crash message.
   void OnCrash(const std::string& function_name,
@@ skipping 19 matching lines @@
   // Provides screen/audio capturing and input injection services for
   // the network process.
   scoped_refptr<DesktopSessionAgent> desktop_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopProcess);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_DESKTOP_PROCESS_H_