Update modules classes to use OVERRIDE / FINAL when needed

Update modules classes to use OVERRIDE / FINAL when needed. Those are useful
for error checking or performance when the compiler supports it.

R=eseidel, jochen
BUG=333316

Review URL: https://codereview.chromium.org/135653002

git-svn-id: svn://svn.chromium.org/blink/trunk@164941 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Update inspector classes to use OVERRIDE / FINAL when needed

Update inspector classes to use OVERRIDE / FINAL when needed. Those are
useful for error checking or performance when the compiler supports it.

R=eseidel, pfeldman@chromium.org, vsevik
BUG=333316

Review URL: https://codereview.chromium.org/135703002

git-svn-id: svn://svn.chromium.org/blink/trunk@164942 bbb929c8-8fbe-4397-9dbb-9b2b20218538