Move code in src/remoting to the new callbacks.

remoting/host/local_input_monitor_mac.mm

Index: remoting/host/local_input_monitor_mac.mm
diff --git a/remoting/host/local_input_monitor_mac.mm b/remoting/host/local_input_monitor_mac.mm
index c6d948457f3724f3cc2c9f44fca29c06707ab54a..6b8f0e023fe88dc0e057e4d1657d60310f66a901 100644
--- a/remoting/host/local_input_monitor_mac.mm
+++ b/remoting/host/local_input_monitor_mac.mm
@@ -7,6 +7,7 @@
 #import <AppKit/AppKit.h>
 #include <set>
 
+#include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ -99,7 +100,7 @@ static CGEventRef LocalMouseMoved(CGEventTapProxy proxy, CGEventType type,
 - (void)hotKeyHit:(GTMCarbonHotKey*)hotKey {
   base::AutoLock lock(hostsLock_);
   for (Hosts::const_iterator i = hosts_.begin(); i != hosts_.end(); ++i) {
-    (*i)->Shutdown(NULL);
+    (*i)->Shutdown(base::Closure());
   }
 }