Revert "Disable P/CompositorImplBrowserTestRefreshRate.VideoPreference on M x86"

This reverts commit 90d9fea6.

Reason for revert: Missed a wild card

Original change's description:
> Disable P/CompositorImplBrowserTestRefreshRate.VideoPreference on M x86
> 
> Test flakes frequently on M emulator.
> 
> BUG=1120813
> 
> Change-Id: I481b39088f22e295e31ec5eed155f168e0fbad78
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373284
> Commit-Queue: Theresa  <twellington@chromium.org>
> Commit-Queue: Haiyang Pan <hypan@google.com>
> Auto-Submit: Theresa  <twellington@chromium.org>
> Reviewed-by: Haiyang Pan <hypan@google.com>
> Cr-Commit-Position: refs/heads/master@{#801172}

TBR=twellington@chromium.org,hypan@google.com

Change-Id: I2ac2f638512ac603c0c7877c90a5de84857e947c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1120813
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2374048Reviewed-by: Haiyang Pan <hypan@google.com>
Commit-Queue: Haiyang Pan <hypan@google.com>
Cr-Commit-Position: refs/heads/master@{#801393}

testing/buildbot/filters/android.emulator_m.content_browsertests.filter

@@ -54,6 +54,3 @@
 
 # crbug.com/954217
 -RenderFrameHostImplBrowserTest.VisibilityScrolledOutOfView
-
-# crbug.com/1120813
--P/CompositorImplBrowserTestRefreshRate.VideoPreference