Active gastrointestinal disease or other malabsorption syndromes Any malabsorption problem that, in the investigator's opinion, would prevent adequate absorption of the study drug History of malabsorption or other condition that would interfere with absorption of study drugs Any malabsorption condition Malabsorption condition that would alter the absorption of orally administered medications Any malabsorption condition Any malabsorption condition Malabsorption syndrome or other conditions that would interfere with intestinal absorption Any malabsorption condition History of known malabsorption syndrome or prior surgery(ies) that may lead to malabsorption Malabsorption condition that would alter the absorption of orally administered medications History of malabsorption or other condition that would interfere with absorption of cobimetinib. Any malabsorption condition Clinically significant gastrointestinal (GI) abnormalities that may alter absorption such as malabsorption syndrome or major resection of the stomach or bowels. For example, subjects should have no more than 50% of the large intestine removed and no sign of malabsorption (e.g. gastrectomy, ileal bypass, chronic diarrhea, Crohn’s disease, malabsorption, gastroparesis). Any malabsorption condition malabsorption syndromes Any malabsorption problem Patients must not have clinically significant malabsorption syndrome or history History of malabsorption or other condition that would interfere with absorption of vemurafenib Known or suspected malabsorption condition or obstruction Patients with hypercalcemia and/or any condition resulting in malabsorption Malabsorption syndrome or other condition that would interfere with intestinal absorption are excluded Any malabsorption condition. Known or suspected malabsorption condition or obstruction; Note: Use of pancreatic enzyme supplements is allowed to control malabsorption Suspected malabsorption or obstruction; note: use of pancreatic enzyme supplements is allowed to control malabsorption Any malabsorption condition Malabsorption syndrome, such as Crohn’s disease Any malabsorption problem History or current evidence of malabsorption or liver disease that would impair the absorption of itraconazole Any malabsorption condition Clinically significant malabsorption syndrome Known or suspected malabsorption condition or obstruction Patients with malabsorption or any other condition that in the opinion of the principal investigator could cause difficulty in absorption of drug Clinically significant malabsorption syndrome Any malabsorption condition Malabsorption syndrome or other condition that would interfere with intestinal absorption Patients with malabsorption syndrome or other condition that would interfere with intestinal absorption Any malabsorption problem Any malabsorption condition Malabsorption, total gastric resection Presence of a malabsorption syndrome possibly affecting drug absorption (e.g., Crohn’s disease or chronic pancreatitis) Have malabsorption syndrome or other gastrointestinal (GI) illness or condition. Any malabsorption condition. Any malabsorption condition Any malabsorption condition. Any malabsorption condition History of current evidence of malabsorption or liver disease Any malabsorption condition Any malabsorption condition Any malabsorption condition Any malabsorption condition Any malabsorption problem PHASE I: Clinically significant malabsorption syndrome Malabsorption syndrome or other conditions that would interfere with intestinal absorption Any malabsorption condition Any malabsorption condition Malabsorption problem that may limit or inhibit the absorption of MEK162 Any malabsorption condition Patients unable to take oral drugs or with known malabsorption syndromes Any malabsorption condition No known malabsorption syndrome Any malabsorption conditions Any malabsorption condition which, in the opinion of the treating physician, will affect the absorption of any of the agents used in this study. History of malabsorption or other condition that would interfere with absorption of vemurafenib/cobimetinib Any malabsorption condition that in the opinion of the investigator would significantly impact drug absorption Any malabsorption condition that in the opinion of the investigator would significantly impact drug absorption A history of malabsorption or other condition that would interfere with absorption of vemurafenib or cobimetinib. Malabsorption syndrome or other condition that would interfere with enteric absorption Patients with uncontrolled malabsorption syndromes Any malabsorption condition Malabsorption syndrome Malabsorption ; Any malabsorption problem Any malabsorption problem Any malabsorption problem Any malabsorption problem Subjects with gastrointestinal conditions which might result in malabsorption of the study drug Any malabsorption disease/syndrome