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

Chromium just automatically embeds a page with PDF, the custom plugin is bundled up with Chrome. Adobe and Google has some mutual agreement:

You can right click and inspect the PDF Native Viewer to see yourself, you will see something like the following: