Fix heap-use-after-free in V8::Initialize()
Fix heap-use-after-free in V8::Initialize()

BUG=pdfium:376
R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1651193005 .

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