Delete offending semi-colon from gpu_messages.h
Delete offending semi-colon from gpu_messages.h

CL that introduced the change:
http://codereview.chromium.org/7292010/
Committed r91742

BUG=none
TEST=none
TBR=apatrick

Review URL: http://codereview.chromium.org/7324004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@91743 0039d316-1c4b-4281-b951-d872f2087c98

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