Move base to DEPS

base/metrics/user_metrics.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 "base/metrics/user_metrics.h"
-
-#include <vector>
-
-#include "base/lazy_instance.h"
-#include "base/threading/thread_checker.h"
-
-namespace base {
-namespace {
-
-// A helper class for tracking callbacks and ensuring thread-safety.
-class Callbacks {
- public:
-  Callbacks() {}
-
-  // Records the |action|.
-  void Record(const std::string& action) {
-    DCHECK(thread_checker_.CalledOnValidThread());
-    for (size_t i = 0; i < callbacks_.size(); ++i) {
-      callbacks_[i].Run(action);
-    }
-  }
-
-  // Adds |callback| to the list of |callbacks_|.
-  void AddCallback(const ActionCallback& callback) {
-    DCHECK(thread_checker_.CalledOnValidThread());
-    callbacks_.push_back(callback);
-  }
-
-  // Removes the first instance of |callback| from the list of |callbacks_|, if
-  // there is one.
-  void RemoveCallback(const ActionCallback& callback) {
-    DCHECK(thread_checker_.CalledOnValidThread());
-    for (size_t i = 0; i < callbacks_.size(); ++i) {
-      if (callbacks_[i].Equals(callback)) {
-        callbacks_.erase(callbacks_.begin() + i);
-        return;
-      }
-    }
-  }
-
- private:
-  base::ThreadChecker thread_checker_;
-  std::vector<ActionCallback> callbacks_;
-
-  DISALLOW_COPY_AND_ASSIGN(Callbacks);
-};
-
-base::LazyInstance<Callbacks> g_callbacks = LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-void RecordAction(const UserMetricsAction& action) {
-  g_callbacks.Get().Record(action.str_);
-}
-
-void RecordComputedAction(const std::string& action) {
-  g_callbacks.Get().Record(action);
-}
-
-void AddActionCallback(const ActionCallback& callback) {
-  g_callbacks.Get().AddCallback(callback);
-}
-
-void RemoveActionCallback(const ActionCallback& callback) {
-  g_callbacks.Get().RemoveCallback(callback);
-
-}
-
-}  // namespace base