Remove base::StringValue

extensions/browser/api/metrics_private/metrics_private_api.cc

 // Copyright (c) 2012 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 "extensions/browser/api/metrics_private/metrics_private_api.h"
 
 #include <limits.h>
 
 #include <algorithm>
 
@@ skipping 34 matching lines @@
       ExtensionsAPIClient::Get()->GetMetricsPrivateDelegate();
 
   return RespondNow(OneArgument(base::MakeUnique<base::Value>(
       delegate && delegate->IsCrashReportingEnabled())));
 }
 
 ExtensionFunction::ResponseAction MetricsPrivateGetFieldTrialFunction::Run() {
   std::string name;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &name));
 
-  return RespondNow(OneArgument(base::MakeUnique<base::StringValue>(
-      base::FieldTrialList::FindFullName(name))));
+  return RespondNow(OneArgument(
+      base::MakeUnique<base::Value>(base::FieldTrialList::FindFullName(name))));
 }
 
 ExtensionFunction::ResponseAction
 MetricsPrivateGetVariationParamsFunction::Run() {
   std::unique_ptr<GetVariationParams::Params> params(
       GetVariationParams::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
   GetVariationParams::Results::Params result;
   std::unique_ptr<base::DictionaryValue> dict;
@@ skipping 139 matching lines @@
   std::unique_ptr<RecordLongTime::Params> params(
       RecordLongTime::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
   static const int kOneHourMs = 60 * 60 * 1000;
   RecordValue(params->metric_name, base::HISTOGRAM, 1, kOneHourMs, 50,
               params->value);
   return RespondNow(NoArguments());
 }
 
 }  // namespace extensions