Initialize V8 before starting embedder tests
Initialize V8 before starting embedder tests

BUG=none
R=thestig@chromium.org, tsepez@chromium.org

Review URL: https://codereview.chromium.org/1462313002 .

DrAlexx/pdfium,DrAlexx/pdfium,andoma/pdfium,andoma/pdfium,DrAlexx/pdfium,DrAlexx/pdfium,andoma/pdfium,andoma/pdfium