Merge 94840 - Crashes in WebCore::ApplyStyleCommand.doApply()

Merge 94840 - Crashes in WebCore::ApplyStyleCommand.doApply()
https://bugs.webkit.org/show_bug.cgi?id=67765

Patch by Shinya Kawanaka <shinyak@google.com>; on 2011-09-09
Reviewed by Ryosuke Niwa.

WebCore::enclosingBlock may return null, but ApplyStyleCommand::applyBlockStyle did not check it. This patch make it to be checked.

Source/WebCore:

Test: editing/style/remove-format-without-enclosing-block.html

* editing/ApplyStyleCommand.cpp:
(WebCore::ApplyStyleCommand::applyBlockStyle): Added null check.

LayoutTests:

* editing/style/remove-format-without-enclosing-block-expected.txt: Added.
* editing/style/remove-format-without-enclosing-block.html: Added.

TBR=sullivan@chromium.org
BUG=95550
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=94881