Enable CECPQ2 generally.

Feature flag remains for Finch control should we need to switch it off.

Bug: 930812
Change-Id: I23701f27d5352d563b16ca4cda9fa796587c348e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913021
Auto-Submit: Adam Langley <agl@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714681}

net/base/features.cc

@@ -43,7 +43,7 @@ const base::Feature kTLS13KeyUpdate{"TLS13KeyUpdate",
                                     base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kPostQuantumCECPQ2{"PostQuantumCECPQ2",
-                                       base::FEATURE_DISABLED_BY_DEFAULT};
+                                       base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kNetUnusedIdleSocketTimeout{
     "NetUnusedIdleSocketTimeout", base::FEATURE_DISABLED_BY_DEFAULT};