Strength reduce Mac only Frame::searchForLabelsBeforeElement and Frame::matchLabelsAg...

Strength reduce Mac only Frame::searchForLabelsBeforeElement and Frame::matchLabelsAgainstElement into callers
https://bugs.webkit.org/show_bug.cgi?id=69230

Reviewed by Anders Carlsson.

../WebCore:

* WebCore.exp.in:
* page/Frame.h:
* page/mac/FrameMac.mm:

../WebKit/mac:

* WebView/WebHTMLRepresentation.mm:
(regExpForLabels):
(searchForLabelsBeforeElement):
(matchLabelsAgainstString):
(matchLabelsAgainstElement):
(-[WebHTMLRepresentation searchForLabels:beforeElement:resultDistance:resultIsInCellAbove:]):
(-[WebHTMLRepresentation matchLabels:againstElement:]):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96480 268f45cc-cd09-0410-ab3c-d52691b4dbfc