Fixing Github Issue #5 Shadow DOM img rendered with bottom "padding"

[tregoning]

Fix for #5

Here is a reduced test case showing the issue: http://jsbin.com/jufiga/4/

[googlebot]

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[tregoning]

Just signed the CLA

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

[tregoning]

Attempt to see if a comment will bump the googlebot check

[googlebot]

CLAs look good, thanks!