Where's the source code to the native PDF viewer in Google Chrome?

Question

Can\'t seem to find it in trunk. Is this actually part of the open-source Chromium project? Or is the source to this not actually released? Only mention I could find:

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Answer 1

I just cite a snippet of the Chromium wiki (last updated on Nov 20, 2012):

The Chrome PDF plugin uses 3rd-party non-free code; no Free Software PDF plugin exists that supports all the PDF features we'd like (such as filling in forms). :(