Revert of components/metrics: Add runtime memory leak detector

components/metrics/leak_detector/ranked_list.cc

-// Copyright 2015 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/metrics/leak_detector/ranked_list.h"
-
-#include <algorithm>
-
-namespace metrics {
-namespace leak_detector {
-
-RankedList::RankedList(size_t max_size) : max_size_(max_size) {}
-
-RankedList::~RankedList() {}
-
-RankedList::RankedList(RankedList::RValue other)
-    : max_size_(other.object->max_size_) {
-  entries_.swap(other.object->entries_);
-}
-
-RankedList& RankedList::operator=(RankedList::RValue other) {
-  max_size_ = other.object->max_size_;
-  entries_.swap(other.object->entries_);
-  return *this;
-}
-
-void RankedList::Add(const ValueType& value, int count) {
-  // Determine where to insert the value given its count.
-  EntryList::iterator iter = std::upper_bound(entries_.begin(), entries_.end(),
-                                              Entry{ValueType(), count});
-
-  // If the list is full, do not add any entry with |count| if does not exceed
-  // the lowest count of the entries in the list.
-  if (size() == max_size_ && iter == end())
-    return;
-
-  entries_.insert(iter, Entry({value, count}));
-
-  // Limit the list size if it exceeds the maximum allowed size.
-  if (entries_.size() > max_size_)
-    entries_.resize(max_size_);
-}
-
-}  // namespace leak_detector
-}  // namespace metrics