Make the comment at the top of the file match the code.
Make the comment at the top of the file match the code.

Remove the unused RRResolverJob::Cancel method.

Remove job from inflight_ if worker cannot be started.

R=agl
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/5574008

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@70460 0039d316-1c4b-4281-b951-d872f2087c98

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