Reviewed by Ken and John.

    Reviewed by Ken and John.

	<rdar://problem/3759228> REGRESSION (Mail): stray characters when entering text via input method right after newline

	* khtml/editing/htmlediting_impl.cpp:
        (khtml::CompositeEditCommandImpl::inputText): Add an optional
	selectInsertedText parameter.
        (khtml::ReplaceSelectionCommandImpl::doApply): Let the inputText operation
	select the text when inserting plain text, because it already knows all the right
	information to do so, and this function doesn't (sometimes text is inserted
	before the start of the old selection, not after!)
        * khtml/editing/htmlediting_impl.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@7630 268f45cc-cd09-0410-ab3c-d52691b4dbfc