[Mac] Specialize strings for that say "close my browser" to use "quit my browser".
[Mac] Specialize strings for that say "close my browser" to use "quit my browser".

R=mark
BUG=40863
TEST=none

Review URL: http://codereview.chromium.org/3124030

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@56679 0039d316-1c4b-4281-b951-d872f2087c98

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