Reviewed by Dave Harrison.

    Reviewed by Dave Harrison.

	- remove remaining uses of upstream/downstream DoNotStayInBlock

        * khtml/editing/htmlediting.cpp:
        (khtml::CompositeEditCommand::moveParagraphContentsToNewBlockIfNecessary):
        (khtml::ApplyStyleCommand::nodeFullySelected):
        (khtml::ApplyStyleCommand::nodeFullyUnselected):
        (khtml::DeleteSelectionCommand::insertPlaceholderForAncestorBlockContent):
        (khtml::InsertParagraphSeparatorCommand::doApply):
        (khtml::InsertParagraphSeparatorInQuotedContentCommand::doApply):
        (khtml::InsertTextCommand::insertSpace):
        (khtml::ReplaceSelectionCommand::doApply):

        * khtml/editing/visible_position.cpp:
        (khtml::enclosingBlockFlowElement): New helper function.
	* khtml/editing/visible_position.h:

        * khtml/editing/visible_units.cpp:
        (khtml::inSameBlock): Check enclosing block flows instead of comparing
	visible block starts. Two nested blocks may have the same visible start but
	different visible ends, so the old check would give false positives.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9142 268f45cc-cd09-0410-ab3c-d52691b4dbfc