[Mac] Blacklist PDF so that they are downloaded instead of handled by QuickTime
[Mac] Blacklist PDF so that they are downloaded instead of handled by QuickTime

BUG=13716, 26075
TEST=Click on a link to a PDF. It should download rather than display the first page.

Review URL: http://codereview.chromium.org/370002

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@31094 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