This fixes compilation errors as the following: error: constructor must explicitly initialize the const member BUG=506663 R=aluebs@webrtc.org, tommi@webrtc.org Signed-off-by: Eduardo Lima (Etrunko) <eduardo.lima@intel.com> Review URL: https://codereview.webrtc.org/1222233002 Cr-Commit-Position: refs/heads/master@{#9538}