Store network quality samples so we can compute percentiles.

components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
index 6beee3cf6ce6f509c9b0ebae0bf41df0b7958cbc..667c86df30242e0699e843511c0ef0ffbbc4e219 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
@@ -377,7 +377,7 @@ bool DataReductionProxyConfig::IsNetworkQualityProhibitivelySlow(
     return false;
 
   net::NetworkQuality network_quality =
-      network_quality_estimator->GetEstimate();
+      network_quality_estimator->GetPeakEstimate();
   // TODO(tbansal): Set |network_prohibitively_slow| based on medians
   // provided by NetworkQualityEstimator API and field trial parameters.
   // Also, ensure that state of network is not changed more than once within