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

remoting/host/win/session_input_injector.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_WIN_SESSION_INPUT_INJECTOR_H_
 #define REMOTING_HOST_WIN_SESSION_INPUT_INJECTOR_H_
 
 #include <memory>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "remoting/host/input_injector.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 } // namespace base
 
 namespace remoting {
 
-// Monitors and passes key/mouse events to a nested event executor. Injects
-// Secure Attention Sequence (SAS) when Ctrl+Alt+Del key combination has been
-// detected.
+// Monitors and passes key/mouse events to a nested event executor. Also handles
+// Ctrl+Alt+Del and Win+L key combinations by invoking the given callbacks.
 class SessionInputInjectorWin : public InputInjector {
  public:
-  // |inject_sas| is invoked on |inject_sas_task_runner| to generate SAS on
-  // Vista+.
+  // |inject_sas| and |lock_workstation| are invoked on
+  // |execute_action_task_runner|.
   SessionInputInjectorWin(
       scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
       std::unique_ptr<InputInjector> nested_executor,
-      scoped_refptr<base::SingleThreadTaskRunner> inject_sas_task_runner,
-      const base::Closure& inject_sas);
+      scoped_refptr<base::SingleThreadTaskRunner> execute_action_task_runner,
+      const base::Closure& inject_sas,
+      const base::Closure& lock_workstation);
   ~SessionInputInjectorWin() override;
 
   // InputInjector implementation.
   void Start(
       std::unique_ptr<protocol::ClipboardStub> client_clipboard) override;
 
   // protocol::ClipboardStub implementation.
   void InjectClipboardEvent(
       const protocol::ClipboardEvent& event) override;
 
   // protocol::InputStub implementation.
   void InjectKeyEvent(const protocol::KeyEvent& event) override;
   void InjectTextEvent(const protocol::TextEvent& event) override;
   void InjectMouseEvent(const protocol::MouseEvent& event) override;
   void InjectTouchEvent(const protocol::TouchEvent& event) override;
 
  private:
   // The actual implementation resides in SessionInputInjectorWin::Core class.
   class Core;
   scoped_refptr<Core> core_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionInputInjectorWin);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_WIN_SESSION_INPUT_INJECTOR_H_