Use StringPiece more in base::Value interfaces.

components/domain_reliability/context_unittest.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/domain_reliability/context.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
+#include "base/strings/string_piece.h"
 #include "components/domain_reliability/beacon.h"
 #include "components/domain_reliability/dispatcher.h"
 #include "components/domain_reliability/scheduler.h"
 #include "components/domain_reliability/test_util.h"
 #include "components/domain_reliability/uploader.h"
 #include "net/base/net_errors.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace domain_reliability {
@@ skipping 27 matching lines @@
   beacon->upload_depth = 0;
   beacon->sample_rate = 1.0;
   return beacon;
 }
 
 std::unique_ptr<DomainReliabilityBeacon> MakeBeacon(MockableTime* time) {
   return MakeCustomizedBeacon(time, "tcp.connection_reset", "", false);
 }
 
 template <typename ValueType,
-          bool (DictionaryValue::* GetValueType)(const std::string&,
-                                                 ValueType*) const>
+          bool (DictionaryValue::*GetValueType)(base::StringPiece, ValueType*)
+              const>
 struct HasValue {
   bool operator()(const DictionaryValue& dict,
                   const std::string& key,
                   ValueType expected_value) {
     ValueType actual_value;
     bool got_value = (dict.*GetValueType)(key, &actual_value);
     if (got_value)
       EXPECT_EQ(expected_value, actual_value);
     return got_value && (expected_value == actual_value);
   }
@@ skipping 459 matching lines @@
   beacon->chrome_error = net::OK;
   context_->OnBeacon(std::move(beacon));
   context_->GetQueuedBeaconsForTesting(&beacons);
   EXPECT_EQ(0u, beacons.size());
 }
 
 // TODO(juliatuttle): Add beacon_unittest.cc to test serialization.
 
 }  // namespace
 }  // namespace domain_reliability