TextIndicator should have getters for TextIndicator::Data properties

TextIndicator should have getters for TextIndicator::Data properties
https://bugs.webkit.org/show_bug.cgi?id=138920

Reviewed by Beth Dakin.

Instead of having clients reach into the data(), add getters.
Remove frameRect(), which is identical to the textBoundingRectInWindowCoordinates getter.
Remove declarations for draw/drawContentImage, which were already removed.

* Shared/TextIndicator.cpp:
(WebKit::TextIndicator::frameRect): Deleted.
* Shared/TextIndicator.h:
(WebKit::TextIndicator::textBoundingRectInWindowCoordinates):
(WebKit::TextIndicator::textRectsInBoundingRectCoordinates):
(WebKit::TextIndicator::contentImageScaleFactor):
(WebKit::TextIndicator::contentImageWithHighlight):
(WebKit::TextIndicator::contentImage):
* UIProcess/mac/TextIndicatorWindow.mm:
(-[WKTextIndicatorView initWithFrame:textIndicator:margin:]):
(-[WKTextIndicatorView presentWithCompletionHandler:]):
(WebKit::TextIndicatorWindow::setTextIndicator):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@176418 268f45cc-cd09-0410-ab3c-d52691b4dbfc