WebFrameImpl::GetSelection(): Replace NBSPs with spaces.
WebFrameImpl::GetSelection(): Replace NBSPs with spaces.

Also, on windows, replace new lines with window style new lines. This call is just there to match Pasteboard::writeSelection(), since AFAICT WebFrameImpl::GetSelection() is never used on any platform besides linux.

BUG=16926
TEST=see bug

Review URL: http://codereview.chromium.org/155650

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@20920 0039d316-1c4b-4281-b951-d872f2087c98

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