remoting/host: Fix cpplint warning of header guards.

remoting/host/local_input_monitor_thread_linux.h

Index: remoting/host/local_input_monitor_thread_linux.h
diff --git a/remoting/host/local_input_monitor_thread_linux.h b/remoting/host/local_input_monitor_thread_linux.h
index 5b5dd5908174b4572b1b7bf195fdc81cd25085a6..05fda5fd1c903dbf25cc3266d726dbc45b1e9290 100644
--- a/remoting/host/local_input_monitor_thread_linux.h
+++ b/remoting/host/local_input_monitor_thread_linux.h
@@ -2,8 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef LOCAL_INPUT_MONITOR_THREAD_LINUX_H_
-#define LOCAL_INPUT_MONITOR_THREAD_LINUX_H_
+#ifndef REMOTING_HOST_LOCAL_INPUT_MONITOR_THREAD_LINUX_H_
+#define REMOTING_HOST_LOCAL_INPUT_MONITOR_THREAD_LINUX_H_
+#pragma once
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ -21,9 +22,8 @@ class MouseMoveObserver;
 
 class LocalInputMonitorThread : public base::SimpleThread {
  public:
-  LocalInputMonitorThread(
-      MouseMoveObserver* mouse_move_observer,
-      const base::Closure& disconnect_callback);
+  LocalInputMonitorThread(MouseMoveObserver* mouse_move_observer,
+                          const base::Closure& disconnect_callback);
   virtual ~LocalInputMonitorThread();
 
   void Stop();
@@ -45,4 +45,4 @@ class LocalInputMonitorThread : public base::SimpleThread {
 
 }  // namespace remoting
 
-#endif
+#endif  // REMOTING_HOST_LOCAL_INPUT_MONITOR_THREAD_LINUX_H_