AVFoundationCaptureV2: disable by default.

Reason: breaks post-commit testcase.

Bug: 1128470
Change-Id: I6a6745e9ba8150dcac2408af1b73186ac05a75d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2421308Reviewed-by: Henrik Boström <hbos@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Markus Handell <handellm@google.com>
Cr-Commit-Position: refs/heads/master@{#808818}

media/base/media_switches.cc

@@ -662,7 +662,7 @@ const base::Feature MEDIA_EXPORT kMediaFoundationVP8Decoding{
 // Controls whether the next version mac capturer, including power improvements,
 // zero copy operation, and other improvements, is active.
 const base::Feature MEDIA_EXPORT kAVFoundationCaptureV2{
-    "AVFoundationCaptureV2", base::FEATURE_ENABLED_BY_DEFAULT};
+    "AVFoundationCaptureV2", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature MEDIA_EXPORT kVideoToolboxVp9Decoding{
     "VideoToolboxVp9Decoding", base::FEATURE_DISABLED_BY_DEFAULT};