[Mac] In modal JS dialogs with text fields, disable line breaks and just overflow the text box.
[Mac] In modal JS dialogs with text fields, disable line breaks and just overflow the text box.

BUG=65232
TEST=See reduced test case in bug.

Review URL: http://codereview.chromium.org/6028013

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@70614 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser