Define separate failure methods for each grab failure code  We can tell which error from stack trace.
Define separate failure methods for each grab failure code
 We can tell which error from stack trace.

BUG=chromium-os:15002
TEST=none

Review URL: http://codereview.chromium.org/6952013

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@84636 0039d316-1c4b-4281-b951-d872f2087c98

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