[Mac] Add breakpad info for crashes in the target/action dispatcher.
[Mac] Add breakpad info for crashes in the target/action dispatcher.

-[NSApplication sendAction:to:from:] is a central dispatcher for
target-action messages sent by controls.  Backtraces from here often
contain only Cocoa messages, making it hard to tell where things are
at when a freed target gets messaged.  Add additional info like the
action being requested and the tag of the sender.

http://crbug.com/24460
TEST=Browser continues to work.

Review URL: http://codereview.chromium.org/269039

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@28731 0039d316-1c4b-4281-b951-d872f2087c98

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