Remove obsolete comments. No code change.
Remove obsolete comments. No code change.

BUG=None
TEST=None
TBR=zork

Review URL: https://chromiumcodereview.appspot.com/10027009

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@131319 0039d316-1c4b-4281-b951-d872f2087c98

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