Merge 102392 - Line breaks are lost when pasted into textarea text starting with a blank line set...

Merge 102392 - Line breaks are lost when pasted into textarea text starting with a blank line set while textarea is hidden
https://bugs.webkit.org/show_bug.cgi?id=74126

Reviewed by Tony Chang.

The bug was caused by the code that generated text out of pre-rendered text was generating div's inside the fragment
pasted into textarea even though serialization algorithm in textarea doesn't handle block elements.

Fixed the bug by special-casing this in createFragmentFromText. In the long run, we should really get rid of this
whole pre-rendering trick.

* editing/markup.cpp:
(WebCore::createFragmentFromText):
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=103989