Send gesture events to SkyView in sky_viewer
Send gesture events to SkyView in sky_viewer

Previously we sent gesture events only to the WebView.

R=tonyg@chromium.org

Review URL: https://codereview.chromium.org/1198493003.

chinmaygarde/mojo,afandria/mojo,afandria/mojo,afandria/mojo,chinmaygarde/mojo,chinmaygarde/mojo,chinmaygarde/mojo,jianglu/mojo,jianglu/mojo,chinmaygarde/mojo,chinmaygarde/mojo,afandria/mojo,jianglu/mojo,chinmaygarde/mojo,jianglu/mojo,chinmaygarde/mojo,afandria/mojo,chinmaygarde/mojo,jianglu/mojo,jianglu/mojo,afandria/mojo,jianglu/mojo,jianglu/mojo,afandria/mojo,afandria/mojo