Implement CSSOM DocumentView.caretRangeFromPoint

Reviewed by Timothy Hatcher.

Tests: fast/dom/Document/CaretRangeFromPoint/basic.html
       fast/dom/Document/CaretRangeFromPoint/replace-element.html

* dom/Document.cpp:
(WebCore::Document::caretRangeFromPoint):
* dom/Document.h:
* dom/Document.idl:

LayoutTests: Test for https://bugs.webkit.org/show_bug.cgi?id=27046
Implement CSSOM DocumentView.caretRangeFromPoint

Reviewed by Timothy Hatcher.

* fast/dom/Document/CaretRangeFromPoint: Added.
* fast/dom/Document/CaretRangeFromPoint/basic-expected.txt: Added.
* fast/dom/Document/CaretRangeFromPoint/basic.html: Added.
* fast/dom/Document/CaretRangeFromPoint/replace-element-expected.txt: Added.
* fast/dom/Document/CaretRangeFromPoint/replace-element.html: Added.
* fast/dom/Window/window-properties-expected.txt:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@48188 268f45cc-cd09-0410-ab3c-d52691b4dbfc