Rebaseline audio-repaint.html

TBR=pkasting@chromium.org

Review URL: https://codereview.chromium.org/409333002

git-svn-id: svn://svn.chromium.org/blink/trunk@178726 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add NPAPI header include path to GN blink config

WebBindings.h includes "bindings/npruntime.h" which requires that the NPAPI directory be on the search path. This patch makes it so that targets depending on blink headers will get this seach path.

Review URL: https://codereview.chromium.org/411653003

git-svn-id: svn://svn.chromium.org/blink/trunk@178727 bbb929c8-8fbe-4397-9dbb-9b2b20218538