Enable JankTracking on trunk.

Bug: 581518
Change-Id: I84da9123cc48ca9fca31488154cba5ab58bafee9
Reviewed-on: https://chromium-review.googlesource.com/c/1440466
Reviewed-by: Chris Harrelson <[email protected]>
Commit-Queue: Steve Kobes <[email protected]>
Cr-Commit-Position: refs/heads/master@{#631893}
diff --git a/third_party/blink/common/features.cc b/third_party/blink/common/features.cc
index 3dda6a0..8739f72a 100644
--- a/third_party/blink/common/features.cc
+++ b/third_party/blink/common/features.cc
@@ -40,7 +40,7 @@
 // Tracks "jank" from layout objects changing their visual location between
 // animation frames (see crbug.com/581518).
 const base::Feature kJankTracking{"JankTracking",
-                                  base::FEATURE_DISABLED_BY_DEFAULT};
+                                  base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kJankTrackingSweepLine{"JankTrackingSweepLine",
                                            base::FEATURE_DISABLED_BY_DEFAULT};