Moved BrowsingDataCounter and part of BrowsingDataCounterUtils to components.

components/browsing_data/counters/browsing_data_counter.cc

Index: components/browsing_data/counters/browsing_data_counter.cc
diff --git a/components/browsing_data/counters/browsing_data_counter.cc b/components/browsing_data/counters/browsing_data_counter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..53065c3b3627f7ba56aad60ce3a8074eb6bb9dda
--- /dev/null
+++ b/components/browsing_data/counters/browsing_data_counter.cc
@@ -0,0 +1,96 @@
+// Copyright (c) 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 "components/browsing_data/counters/browsing_data_counter.h"
+
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "components/browsing_data/browsing_data_utils.h"
+
+BrowsingDataCounter::BrowsingDataCounter(const std::string& pref_name)
+    : pref_name_(pref_name) {}
+
+BrowsingDataCounter::~BrowsingDataCounter() {}
+
+void BrowsingDataCounter::Init(PrefService* pref_service,
+                               const std::string& delete_time_period_pref,
+                               const Callback& callback) {
+  DCHECK(!initialized_);
+  callback_ = callback;
+  pref_service_ = pref_service;
+  pref_.Init(GetPrefName(), pref_service_,
+             base::Bind(&BrowsingDataCounter::Restart, base::Unretained(this)));
+  period_.Init(
+      delete_time_period_pref, pref_service_,
+      base::Bind(&BrowsingDataCounter::Restart, base::Unretained(this)));
+
+  initialized_ = true;
+  OnInitialized();
+}
+
+void BrowsingDataCounter::OnInitialized() {}
+
+base::Time BrowsingDataCounter::GetPeriodStart() {
+  return CalculateBeginDeleteTime(static_cast<TimePeriod>(*period_));
+}
+
+void BrowsingDataCounter::Restart() {
+  DCHECK(initialized_);
+
+  // If this data type was unchecked for deletion, we do not need to count it.
+  if (!pref_service_->GetBoolean(GetPrefName()))
+    return;
+
+  callback_.Run(base::WrapUnique(new Result(this)));
+
+  Count();
+}
+
+void BrowsingDataCounter::ReportResult(ResultInt value) {
+  DCHECK(initialized_);
+  callback_.Run(base::WrapUnique(new FinishedResult(this, value)));
+}
+
+void BrowsingDataCounter::ReportResult(std::unique_ptr<Result> result) {
+  DCHECK(initialized_);
+  callback_.Run(std::move(result));
+}
+
+const std::string& BrowsingDataCounter::GetPrefName() const {
+  return pref_name_;
+}
+
+PrefService* BrowsingDataCounter::GetPrefs() const {
+  return pref_service_;
+}
+
+// BrowsingDataCounter::Result -------------------------------------------------
+
+BrowsingDataCounter::Result::Result(const BrowsingDataCounter* source)
+    : source_(source) {}
+
+BrowsingDataCounter::Result::~Result() {}
+
+bool BrowsingDataCounter::Result::Finished() const {
+  return false;
+}
+
+// BrowsingDataCounter::FinishedResult -----------------------------------------
+
+BrowsingDataCounter::FinishedResult::FinishedResult(
+    const BrowsingDataCounter* source,
+    ResultInt value)
+    : Result(source), value_(value) {}
+
+BrowsingDataCounter::FinishedResult::~FinishedResult() {}
+
+bool BrowsingDataCounter::FinishedResult::Finished() const {
+  return true;
+}
+
+BrowsingDataCounter::ResultInt BrowsingDataCounter::FinishedResult::Value()
+    const {
+  return value_;
+}