Make Rappor enabled by default.

components/rappor/rappor_service.cc

 // Copyright 2014 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 "components/rappor/rappor_service.h"
 
 #include "base/base64.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
@@ skipping 17 matching lines @@
 const int kLogIntervalSeconds = 30 * 60;
 
 const char kMimeType[] = "application/vnd.chrome.rappor";
 
 // Constants for the RAPPOR rollout field trial.
 const char kRapporRolloutFieldTrialName[] = "RapporRollout";
 
 // Constant for the finch parameter name for the server URL
 const char kRapporRolloutServerUrlParam[] = "ServerUrl";
 
+// The rappor server's URL.
+const char kDefaultServerUrl[] = "https://clients4.google.com/rappor";
+
 GURL GetServerUrl() {
-  return GURL(chrome_variations::GetVariationParamValue(
+  std::string server_url = chrome_variations::GetVariationParamValue(
       kRapporRolloutFieldTrialName,
-      kRapporRolloutServerUrlParam));
+      kRapporRolloutServerUrlParam);
+  if (!server_url.empty())
+    return GURL(server_url);
+  else
+    return GURL(kDefaultServerUrl);
 }
 
 const RapporParameters kRapporParametersForType[NUM_RAPPOR_TYPES] = {
     // ETLD_PLUS_ONE_RAPPOR_TYPE
     {128 /* Num cohorts */,
      16 /* Bloom filter size bytes */,
      2 /* Bloom filter hash count */,
      rappor::PROBABILITY_50 /* Fake data probability */,
      rappor::PROBABILITY_50 /* Fake one probability */,
      rappor::PROBABILITY_75 /* One coin probability */,
@@ skipping 132 matching lines @@
     DCHECK_EQ(parameters.ToString(), metric->parameters().ToString());
     return metric;
   }
 
   RapporMetric* new_metric = new RapporMetric(metric_name, parameters, cohort_);
   metrics_map_[metric_name] = new_metric;
   return new_metric;
 }
 
 }  // namespace rappor