Add pdr to platform graphics watchlist
Add pdr to platform graphics watchlist

No code change, no change in behavior.

TBR=schenney@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15074004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@149993 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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