Add some definitions to npapi/bindings/npapi.h.
Add some definitions to npapi/bindings/npapi.h.

I don't quite understand what all the different versions of npapi.h are about, but this is the minium hackery to get webkit building again.

BUG=https://bugs.webkit.org/show_bug.cgi?id=27385
TBR=evan,jam

Review URL: http://codereview.chromium.org/159029

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@21011 0039d316-1c4b-4281-b951-d872f2087c98

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