Reviewed by Adele Peterson.

WebCore:

The fix for Bug 50710 in r73799 introduced an off-by-one error
when copying nodes to a local NodeVector for processing.  A fix
was attempted for Bug 50854 in r73818, but instead of stopping
at the end offset, it iterates through all the sibling nodes
because the loop variable (i) is never incremented.  To clean
this up, revert back to the code in r73799 and fix the
off-by-one error.

Test: fast/dom/Range/range-clone-contents.html

* dom/Range.cpp:
(WebCore::Range::processContents): Fix the loop that copies
nodes to a local NodeVector by restoring the code from r73799
and fixing the off-by-one error.

LayoutTests:

* fast/dom/Range/range-clone-contents-expected.txt: Added.
* fast/dom/Range/range-clone-contents.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@75882 268f45cc-cd09-0410-ab3c-d52691b4dbfc