Remove reference to deprecated property in iOS build of base-console …

…demo

Summary: `applicationFrame` property of `UIScreen` has been deprecated since iOS 9.0.

Reviewed By: thorntondr

Differential Revision: D60075989

fbshipit-source-id: 3b5457f613a539a32bca2d5a986b7878989e21ac

impl/application/ocean/demo/base/console/ios/ViewController.mm

@@ -36,7 +36,7 @@ - (void)viewDidLoad
 	// writing the logs to standard output (e.g,. debug window) and queuing the messages to allow popping them
 	Messenger::get().setOutputType(Messenger::MessageOutput(Messenger::OUTPUT_STANDARD | Messenger::OUTPUT_QUEUED));
 
-	const CGRect rect = [[UIScreen mainScreen] applicationFrame];
+	const CGRect rect = [UIApplication sharedApplication].delegate.window.frame;
 	messengerView_ = [[MessengerView alloc] initWithFrame:rect];
 	[self.view addSubview:messengerView_];