Make Mac Chromoting Disconnect Window look good for R2L systems.

remoting/host/disconnect_window_mac.h

Index: remoting/host/disconnect_window_mac.h
diff --git a/remoting/host/disconnect_window_mac.h b/remoting/host/disconnect_window_mac.h
index 727574f43562fd9682b15857d2783d9faf745769..206d0161235c08b57dfaff168c4ad32ac3018553 100644
--- a/remoting/host/disconnect_window_mac.h
+++ b/remoting/host/disconnect_window_mac.h
@@ -14,16 +14,14 @@ class DisconnectWindowMac;
 @interface DisconnectWindowController : NSWindowController {
  @private
   remoting::ChromotingHost* host_;
-  remoting::DisconnectWindowMac* disconnectWindow_;
   NSString* username_;
   IBOutlet NSTextField* connectedToField_;
   IBOutlet NSButton* disconnectButton_;
 }
 
-- (IBAction)stopSharing:(id)sender;
 - (id)initWithHost:(remoting::ChromotingHost*)host
-            window:(remoting::DisconnectWindowMac*)window
           username:(NSString*)username;
+- (IBAction)stopSharing:(id)sender;
 @end
 
 // A floating window with a custom border. The custom border and background