[CRD iOS] Add support for three-finger gestures

remoting/ios/app/host_view_controller.mm

Index: remoting/ios/app/host_view_controller.mm
diff --git a/remoting/ios/app/host_view_controller.mm b/remoting/ios/app/host_view_controller.mm
index 03d909ca4de603234de90a2c506562246b62adac..b7f45673734c47f9a065edaeefe474bce394425d 100644
--- a/remoting/ios/app/host_view_controller.mm
+++ b/remoting/ios/app/host_view_controller.mm
@@ -98,8 +98,7 @@ static const CGFloat kKeyboardAnimationTime = 0.3;
 - (void)viewWillAppear:(BOOL)animated {
   [super viewWillAppear:animated];
 
-  _clientGestures =
-      [[ClientGestures alloc] initWithView:self.view client:_client];
+  _clientGestures = [[ClientGestures alloc] initWithHostViewController:self];
   [[NSNotificationCenter defaultCenter]
       addObserver:self
          selector:@selector(keyboardWillShow:)
@@ -269,4 +268,10 @@ static const CGFloat kKeyboardAnimationTime = 0.3;
   [self presentViewController:alert animated:YES completion:nil];
 }
 
+#pragma mark properties
+
+- (RemotingClient*)client {
+  return _client;
+}
+
 @end