Globbing _manifest_features.json out of the extension documentation.
Globbing _manifest_features.json out of the extension documentation.

Adding this file broke the extension documentation build script, as it reads
_all_ the JSON files in the directory, and attempts to treat them all as API
docs. The fix I'm introducing in this CL is a stopgap, just so folks can
continue to build docs in the meantime. I don't expect it's the right solution,
just good enough for the moment.

BUG=115614
TEST=run build.py: no errors.
TBR=kalman@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9464005

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@123452 0039d316-1c4b-4281-b951-d872f2087c98

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