[CRD iOS] Injecting scroll events w/ fling animation

remoting/ios/client_gestures.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_IOS_CLIENT_GESTURES_H_
 #define REMOTING_IOS_CLIENT_GESTURES_H_
 
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
@@ skipping 15 matching lines @@
   LEFT_BUTTON = 1,
   MIDDLE_BUTTON = 2,
   RIGHT_BUTTON = 3,
 };
 
 @interface ClientGestures : NSObject<UIGestureRecognizerDelegate> {
  @private
   UILongPressGestureRecognizer* _longPressRecognizer;
   UIPanGestureRecognizer* _panRecognizer;
   UIPanGestureRecognizer* _flingRecognizer;
+  UIPanGestureRecognizer* _scrollRecognizer;
   UIPanGestureRecognizer* _threeFingerPanRecognizer;
   UIPinchGestureRecognizer* _pinchRecognizer;
   UITapGestureRecognizer* _singleTapRecognizer;
   UITapGestureRecognizer* _twoFingerTapRecognizer;
   UITapGestureRecognizer* _threeFingerTapRecognizer;
   UIScreenEdgePanGestureRecognizer* _edgeGesture;
   UISwipeGestureRecognizer* _swipeGesture;
 
   __weak UIView* _view;
   __weak RemotingClient* _client;
 
   HostInputScheme _inputScheme;
 }
 
 - (instancetype)initWithView:(UIView*)view client:(RemotingClient*)client;
 
 // Zoom in/out
 - (IBAction)pinchGestureTriggered:(UIPinchGestureRecognizer*)sender;
 // Left mouse click, moves cursor
 - (IBAction)tapGestureTriggered:(UITapGestureRecognizer*)sender;
 // Scroll the view in 2d
 - (IBAction)panGestureTriggered:(UIPanGestureRecognizer*)sender;
 // Handle one finger fling gesture
 - (IBAction)flingGestureTriggered:(UIPanGestureRecognizer*)sender;
+// Handle two finger scroll gesture
+- (IBAction)scrollGestureTriggered:(UIPanGestureRecognizer*)sender;
 // Right mouse click and drag, moves cursor
 - (IBAction)longPressGestureTriggered:(UILongPressGestureRecognizer*)sender;
 // Right mouse click
 - (IBAction)twoFingerTapGestureTriggered:(UITapGestureRecognizer*)sender;
 // Middle mouse click
 - (IBAction)threeFingerTapGestureTriggered:(UITapGestureRecognizer*)sender;
 // Show hidden menus.  Swipe up for keyboard, swipe down for navigation menu
 - (IBAction)threeFingerPanGestureTriggered:(UIPanGestureRecognizer*)sender;
 
 @end
 
 #endif  //  REMOTING_IOS_CLIENT_GESTURES_H_