Revert 55942 - Pull latest PPAPI to get PaintManager updates.
Revert 55942 - Pull latest PPAPI to get PaintManager updates.

This broke UI tests on Mac:

PPAPITest.Scrollbar: 
/b/slave/chromium-rel-mac-builder/build/src/chrome/test/ui/ppapi_uitest.cc:86: Failure
Value of: escaped_value.c_str()
  Actual: "HandleEvent FAIL: Didn't get callback for scrollbar value change"
Expected: "PASS"

TBR=brettw@chromium.org
Review URL: http://codereview.chromium.org/3104008

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@55972 0039d316-1c4b-4281-b951-d872f2087c98

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