Fixed broken Linux build by changing Counter helper class used by NumElements() from a local class to a nested class as Gregg suggested in http://codereview.chromium.org/574024 . Changed this class to use DISALLOW_COPY_AND_ASSIGN.
Fixed broken Linux build by changing Counter helper class used by
NumElements() from a local class to a nested class as Gregg suggested
in http://codereview.chromium.org/574024 . Changed this class to use
DISALLOW_COPY_AND_ASSIGN.

Review URL: http://codereview.chromium.org/606025

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@38923 0039d316-1c4b-4281-b951-d872f2087c98

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