Services overlay dropdown is often in the wrong place with zoomed pages or horizontal...

Services overlay dropdown is often in the wrong place with zoomed pages or horizontal scrolling
https://bugs.webkit.org/show_bug.cgi?id=135755
<rdar://problem/17907752>

Reviewed by Brady Eidson.

* WebProcess/WebPage/mac/ServicesOverlayController.mm:
(WebKit::ServicesOverlayController::establishHoveredTelephoneHighlight):
(WebKit::ServicesOverlayController::maybeCreateSelectionHighlight):
DDHighlightCreateWithRectsInVisibleRectWithStyleAndDirection adjusts the
location of the button based on the visible rect, trying to keep the button visible.

We're handing it the wrong visible rect, though, not taking scrolling into account.

This leads to pages that scroll horizontally showing the button on the left
even if there's space for it on the right, or sometimes not showing it at all.

Instead, provide the actual main FrameView visible rect; the same coordinate
space that the highlight rects are provided in.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@172344 268f45cc-cd09-0410-ab3c-d52691b4dbfc