[Clean-up] Remove unnecessary default: NOTREACHED() case.

[Clean-up] Remove unnecessary default: NOTREACHED() case.

The (clang) compiler is smart enough to catch this error at compile-time, which
is better than waiting until runtime.

BUG=none
TEST=none
R=keybuk@chromium.org

Committed: https://crrev.com/267aeeb8d85c8503a7fd12bd14654b8ea78d3974
Cr-Commit-Position: refs/heads/master@{#297060}

[Ilya Sherman, 2014-09-26 04:02:42]

isherman@chromium.org changed reviewers:
+ rpaquay@chromium.org

[Ilya Sherman, 2014-09-26 04:02:42]

+Renaud

[rpaquay, 2014-09-26 21:27:24]

lgtm

[Ilya Sherman, 2014-09-26 21:32:46]

The CQ bit was checked by isherman@chromium.org

[commit-bot: I haz the power, 2014-09-26 21:34:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/575343002/1

[commit-bot: I haz the power, 2014-09-26 22:40:12]

Committed patchset #1 (id:1) as 33f06076e138bc910a010914c44be0ced5e7e3f9

[commit-bot: I haz the power, 2014-09-26 22:41:11]

Patchset 1 (id:??) landed as
https://crrev.com/267aeeb8d85c8503a7fd12bd14654b8ea78d3974
Cr-Commit-Position: refs/heads/master@{#297060}