Web Inspector: DTE adds additional space to the end of line.
https://bugs.webkit.org/show_bug.cgi?id=108192

Patch by Andrey Lushnikov <lushnikov@chromium.org> on 2013-01-30
Reviewed by Pavel Feldman.

Append overlay highlight spans before decorations elements and skip
them in _collectLinesFromDom method.

No new tests.

* inspector/front-end/DefaultTextEditor.js:
(WebInspector.TextEditorMainPanel.prototype._appendOverlayHighlight):
(WebInspector.TextEditorMainPanel.prototype._collectLinesFromDOM):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141230 268f45cc-cd09-0410-ab3c-d52691b4dbfc