Split Chromoting's Disconnect button text into 2 parts: name + hotkeys.

remoting/host/disconnect_window.h

Index: remoting/host/disconnect_window.h
diff --git a/remoting/host/disconnect_window.h b/remoting/host/disconnect_window.h
index bf73b095e466bbbd545ad16f1c2a49824d0d9ec4..6ceb67154810c659b6d41e0f6b0257d5a1bf8403 100644
--- a/remoting/host/disconnect_window.h
+++ b/remoting/host/disconnect_window.h
@@ -19,6 +19,10 @@ class DisconnectWindow {
   static const char kSharingWith[];
   static const char kDisconnectButton[];
 
+  static const char kDisconnectKeysLinux[];
+  static const char kDisconnectKeysMac[];
+  static const char kDisconnectKeysWin[];
+
   // Show the disconnect window allowing the user to shut down |host|.
   virtual void Show(ChromotingHost* host, const std::string& username) = 0;