Generalize the net module's LoadLog facility from a passive container, to an event stream (NetLog).

net/base/load_log.cc

-// Copyright (c) 2009 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/base/load_log.h"
-#include "base/logging.h"
-
-namespace net {
-
-LoadLog::LoadLog(size_t max_num_entries)
-    : num_entries_truncated_(0), max_num_entries_(max_num_entries) {
-  DCHECK_GT(max_num_entries, 0u);
-}
-
-// static
-const char* LoadLog::EventTypeToString(EventType event) {
-  switch (event) {
-#define EVENT_TYPE(label) case TYPE_ ## label: return #label;
-#include "net/base/load_log_event_type_list.h"
-#undef EVENT_TYPE
-  }
-  return NULL;
-}
-
-void LoadLog::Add(const Entry& entry) {
-  // Minor optimization. TODO(eroman): use StackVector instead.
-  if (entries_.empty())
-    entries_.reserve(10);  // It is likely we will have at least 10 entries.
-
-  // Enforce a bound of |max_num_entries_| -- once we reach it, keep overwriting
-  // the final entry in the log.
-
-  if (entries_.size() + 1 <= max_num_entries_ ||
-      max_num_entries_ == kUnbounded) {
-    entries_.push_back(entry);
-  } else {
-    num_entries_truncated_ += 1;
-    entries_[max_num_entries_ - 1] = entry;
-  }
-}
-
-void LoadLog::Append(const LoadLog* log) {
-  for (size_t i = 0; i < log->entries().size(); ++i)
-    Add(log->entries()[i]);
-  num_entries_truncated_ += log->num_entries_truncated();
-}
-
-}  // namespace net