GitLab

It overloads operator==, !=, <<  for VideoFrameLayout.
Also, it removes VideoFrameLayout.ToString() as operator<<
can replace it.

BUG=b:110815424
TEST=pass media_unittests --gtest_filter=VideoFrameLayout.*

Change-Id: I634846e456a516695a8f792bebf726d1cea80465
Reviewed-on: https://chromium-review.googlesource.com/c/1333016
Commit-Queue: Shuo-Peng Liao <deanliao@google.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608305}