[EWK_REFACTOR] bringup EWebViewCallbacks::ZoomStarted/ZoomFinished SmartCallback
EWK_REFACTOR guards are removed for bringup ZoomStarted/ZoomFinished SmartCallback.
WebContentsViewEflDelegate::HandleZoomGesture is newly introduced to deliver zoom
gesture events to EWebView, so it can trigger ZoomStarted/ZoomFinished SmartCallback.
Bug: http://web.sec.samsung.net/bugzilla/show_bug.cgi?id=12028
Reviewed by: Antonio Gomes, DONGJUN KiM
Change-Id: I56fb07992f4e7b543cfe45b50f440c732a808a72
Signed-off-by: hh4813.kim <hh4813.kim@samsung.com>