Turns on new CPAT protocol support by default.

components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc

Index: components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc
diff --git a/components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc b/components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc
index f2547d745698270b65e7e34980f32e49a0bb036e..bce0af14a71e6e8662cc729b09d3c66d8e131171 100644
--- a/components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc
+++ b/components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc
@@ -20,7 +20,7 @@ const base::Feature kDataReductionSiteBreakdown{
 // version required the client to make this decision. The new protocol relies
 // on updates primarily to the Chrome-Proxy-Accept-Transform header.
 const base::Feature kDataReductionProxyDecidesTransform{
-    "DataReductionProxyDecidesTransform", base::FEATURE_DISABLED_BY_DEFAULT};
+    "DataReductionProxyDecidesTransform", base::FEATURE_ENABLED_BY_DEFAULT};
 
 }  // namespace features
 }  // namespace data_reduction_proxy