A Safety, Tolerability, and Pharmacokinetics Study of Onartuzumab as Single Agent or in Combination With Sorafenib in Participants With Advanced Hepatocellular Carcinoma

Onartuzumab intravenous infusion at a starting dose of 10 or 15 milligram per kilogram body weight administered every 3 weeks (Q3W) until disease progression or unacceptable toxicity occurs (maximum up to 31 months).

Sorafenib 400 milligram (mg) tablets (2 tablets of 200 mg each) orally once daily or twice daily depending on the cohort assigned until disease progression or unacceptable toxicity occurs (maximum up to 31 months).