Replace deprecated base::NonThreadSafe in chrome/browser/metrics/perf in favor of SequenceChecker.

chrome/browser/metrics/perf/perf_provider_chromeos.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_METRICS_PERF_PERF_PROVIDER_CHROMEOS_H_
 #define CHROME_BROWSER_METRICS_PERF_PERF_PROVIDER_CHROMEOS_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/metrics/perf/cpu_identity.h"
 #include "chrome/browser/metrics/perf/perf_output.h"
 #include "chrome/browser/metrics/perf/random_selector.h"
 #include "chrome/browser/sessions/session_restore.h"
 #include "chromeos/dbus/power_manager_client.h"
 #include "chromeos/login/login_state.h"
 #include "components/metrics/proto/sampled_profile.pb.h"
 
 namespace metrics {
 
 class WindowedIncognitoObserver;
 
 // Provides access to ChromeOS perf data. perf aka "perf events" is a
 // performance profiling infrastructure built into the linux kernel. For more
 // information, see: https://perf.wiki.kernel.org/index.php/Main_Page.
-class PerfProvider : public base::NonThreadSafe,
-                     public chromeos::PowerManagerClient::Observer {
+class PerfProvider : public chromeos::PowerManagerClient::Observer {
  public:
   PerfProvider();
   ~PerfProvider() override;
 
   void Init();
 
   // Stores collected perf data protobufs in |sampled_profiles|. Clears all the
   // stored profile data. Returns true if it wrote to |sampled_profiles|.
   bool GetSampledProfiles(std::vector<SampledProfile>* sampled_profiles);
 
@@ skipping 204 matching lines @@
   base::TimeTicks last_session_restore_collection_time_;
 
   // Points to the on-session-restored callback that was registered with
   // SessionRestore's callback list. When objects of this class are destroyed,
   // the subscription object's destructor will automatically unregister the
   // callback in SessionRestore, so that the callback list does not contain any
   // obsolete callbacks.
   SessionRestore::CallbackSubscription
       on_session_restored_callback_subscription_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   // To pass around the "this" pointer across threads safely.
   base::WeakPtrFactory<PerfProvider> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PerfProvider);
 };
 
 // Exposed for unit testing.
 namespace internal {
 
 // Return the default set of perf commands and their odds of selection given
 // the identity of the CPU in |cpuid|.
 std::vector<RandomSelector::WeightAndValue> GetDefaultCommandsForCpu(
     const CPUIdentity& cpuid);
 
 // For the "PerfCommand::"-prefixed keys in |params|, return the cpu specifier
 // that is the narrowest match for the CPU identified by |cpuid|.
 // Valid CPU specifiers, in increasing order of specificity, are:
 // "default", a system architecture (e.g. "x86_64"), a CPU microarchitecture
 // (currently only Intel uarchs supported), or a CPU model name substring.
 std::string FindBestCpuSpecifierFromParams(
     const std::map<std::string, std::string>& params,
     const CPUIdentity& cpuid);
 
 }  // namespace internal
 
 }  // namespace metrics
 
 #endif  // CHROME_BROWSER_METRICS_PERF_PERF_PROVIDER_CHROMEOS_H_