NetworkQualityEstimator: Enable prefs writing by default

net/nqe/network_quality_estimator_params.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/nqe/network_quality_estimator_params.h"
 
 #include <stdint.h>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
@@ skipping 312 matching lines @@
                 .downstream_throughput_kbps()));
     DCHECK(i == 0 ||
            connection_thresholds[i].IsFaster(connection_thresholds[i - 1]));
   }
 }
 
 double correlation_uma_logging_probability(
     const std::map<std::string, std::string>& variation_params) {
   double correlation_uma_logging_probability =
       GetDoubleValueForVariationParamWithDefaultValue(
-          variation_params, "correlation_logging_probability", 0.0);
+          variation_params, "correlation_logging_probability", 0.01);
   DCHECK_LE(0.0, correlation_uma_logging_probability);
   DCHECK_GE(1.0, correlation_uma_logging_probability);
   return correlation_uma_logging_probability;
 }
 
 bool forced_effective_connection_type_set(
     const std::map<std::string, std::string>& variation_params) {
   return !GetStringValueForVariationParamWithDefaultValue(
               variation_params, "force_effective_connection_type", "")
               .empty();
@@ skipping 15 matching lines @@
   (void)effective_connection_type_available;
 
   return forced_effective_connection_type;
 }
 
 }  // namespace internal
 
 }  // namespace nqe
 
 }  // namespace net