Roll ppapi 163 -> 164.
Roll ppapi 163 -> 164.

Preserves -fvisibility=hidden inside Linux shlib builds, which is
needed to keep libppapi_test.so from getting confused by internal
pepper plugins (all PPAPITests will fail w/o this).

BUG=none
TEST=locally tested with shlib build.

Review URL: http://codereview.chromium.org/3029003

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@52657 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser