Rename one of two ItemView classes

There is one ItemView class in notification_view_md.h so if that
header is in the same translation unit as notification_view.cc
then the local ItemView class will fail to compile. That happens
in jumbo builds.

Bug: 773275
Change-Id: I2911c4cbcc73df186d9520d4182a186a76d2ce34
Reviewed-on: https://chromium-review.googlesource.com/824364
Commit-Queue: Daniel Bratell <[email protected]>
Commit-Queue: Peter Beverloo <[email protected]>
Reviewed-by: Peter Beverloo <[email protected]>
Cr-Commit-Position: refs/heads/master@{#523774}
1 file changed