https://bugs.webkit.org/show_bug.cgi?id=33950

Patch by Santosh Mahto <santosh.ma@samsung.com> on 2013-10-10
Reviewed by Darin Adler.

Source/WebCore:

When paragraph is positioned(relative/absolute/fixed) then deleting
that paragraph cause wrong merging of other(below) paragraphs. This is
happening because positioned element is treated as special element and
on deletion complete paragraph element is removed. The ranges become
paragraph. This issue happens when all the content of special element
are deleted. So the merging of paragraph is avoided in this scenario.

Test: editing/deleting/deleting-relative-positioned-special-element.html

* editing/DeleteSelectionCommand.cpp:
(WebCore::DeleteSelectionCommand::initializeStartEnd):Avoid merging
block when special candidate are included in deletion range

LayoutTests:

LayoutTests:

Added a testcase to verify that when paragraph is relative positioned
then deleting the all content of paragraph should not incorrectly collapse the
others(below) paragraphs.
And Rebaseline the test expectation.

* editing/deleting/5546763-expected.txt: Updated.
* editing/deleting/deleting-relative-positioned-special-element-expected.txt: Added.
* editing/deleting/deleting-relative-positioned-special-element.html: Added.
* editing/unsupported-content/table-delete-001.html: Adjusted to dump
as markup.
* editing/unsupported-content/table-delete-003.html: Adjusted to dump
as markup.

Below tests had wrong cursor position previously now corrected and
both expected file has been changed to markup dump.
* platform/mac/editing/unsupported-content/table-delete-001-expected.txt:
* platform/mac/editing/unsupported-content/table-delete-003-expected.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@157292 268f45cc-cd09-0410-ab3c-d52691b4dbfc