tree d6debc906a3a6e0c7faa189552fd26656cd811fc
parent 3e5db5bc27eee9e1bd1159fd07c279f104a10b0e
author Sameer Agarwal <sameeragarwal@google.com> 1563009567 +0200
committer Sameer Agarwal <sameeragarwal@google.com> 1564097184 +0000

Use override instead of virtual for subclasses.

Now that we are using c++11, it is safer to use override in subclasses
instead of virtual.

This CL does it for the interface, a follow up CL will do it for
other parts of the code base.

Change-Id: Ice8d0f4355cb700019d7a9c1566fbff0099e97d6