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-rw-r--r--chromium/testing/variations/README.md9
1 files changed, 7 insertions, 2 deletions
diff --git a/chromium/testing/variations/README.md b/chromium/testing/variations/README.md
index 9568f20a6b3..dda05d59d01 100644
--- a/chromium/testing/variations/README.md
+++ b/chromium/testing/variations/README.md
@@ -92,13 +92,18 @@ the experiment group name.
> client code, the `name` **must** exactly match the client code and the server
> config.
-The remaining keys -- `enable_features`, `disable_features`, and `params` -- are
-optional.
+The remaining keys -- `enable_features`, `disable_features`, `min_os_version`,
+and `params` -- are optional.
`enable_features` and `disable_features` indicate which features should be
enabled and disabled, respectively, through the
[Feature List API][FeatureListAPI].
+`min_os_version` indicates a minimum OS version level (e.g. "10.0.0") to apply
+the experiment. This string is decoded as a `base::Version`. The same version is
+applied to all platforms. If you need different versions for different
+platforms, you will need to use different studies.
+
`params` is a dictionary mapping parameter name to parameter value.
> Reminder: The variations framework does not actually fetch any field trial