Switch to the branch dev/m39_2150

Switch to the branch dev/m39_2150

Known issues:
RenderWidgetHostViewEfl::GetLastScrollOffset() always returns (0, 0) because old
way of updating scroll offset was removed and now it is required to use
ui::Compositor to get scroll offset.
Figure out where to move code from EWebView::DispatchPostponedGestureEvent()
because DispatchPostponedGestureEvent() is not exist anymore in chromium.

Bug: http://107.108.218.239/bugzilla/show_bug.cgi?id=4403

Change-Id: I34e6bff6405a61200d9148056e8efdbf3d350061
Signed-off-by: Viatcheslav Ostapenko <sl.ostapenko@samsung.com>