Keyboard: scroll up/down with vim bindings

App/Supporting Files/SBrowser-Bridging-Header.h

@@ -8,3 +8,11 @@
 #import <UIKit/UITextField_Private.h>
 #import <WebKit/WKWebViewPrivate.h>
 #import <WebKit/_WKFindDelegate.h>
+
+@interface WKContentView : UIView
+@property (nonatomic, readonly) BOOL isFocusingElement;
+@end
+
+@interface WKWebView (Internal)
+- (WKContentView *)_currentContentView;
+@end