NQE: Use cached estimates

net/nqe/network_qualities_prefs_manager.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_qualities_prefs_manager.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 38 matching lines @@
   }
   return read_prefs;
 }
 
 }  // namespace
 
 NetworkQualitiesPrefsManager::NetworkQualitiesPrefsManager(
     std::unique_ptr<PrefDelegate> pref_delegate)
     : pref_delegate_(std::move(pref_delegate)),
       pref_task_runner_(base::ThreadTaskRunnerHandle::Get()),
-      prefs_(pref_delegate_->GetDictionaryValue().CreateDeepCopy()),
+      prefs_(pref_delegate_->GetDictionaryValue()),
       network_quality_estimator_(nullptr),
       read_prefs_startup_(ConvertDictionaryValueToMap(prefs_.get())),
       pref_weak_ptr_factory_(this) {
   DCHECK(pref_delegate_);
   DCHECK_GE(kMaxCacheSize, prefs_->size());
 
   pref_weak_ptr_ = pref_weak_ptr_factory_.GetWeakPtr();
 }
 
 NetworkQualitiesPrefsManager::~NetworkQualitiesPrefsManager() {
@@ skipping 76 matching lines @@
   }
   DCHECK_GE(kMaxCacheSize, prefs_->size());
 
   // Notify the pref delegate so that it updates the prefs on the disk.
   pref_delegate_->SetDictionaryValue(*prefs_);
 }
 
 ParsedPrefs NetworkQualitiesPrefsManager::ForceReadPrefsForTesting() const {
   DCHECK(pref_task_runner_->RunsTasksOnCurrentThread());
   std::unique_ptr<base::DictionaryValue> value(
-      pref_delegate_->GetDictionaryValue().CreateDeepCopy());
+      pref_delegate_->GetDictionaryValue());
   return ConvertDictionaryValueToMap(value.get());
 }
 
 }  // namespace net