metrics: Add leak detector controller in Chrome OS metrics system

chrome/browser/metrics/chromeos_metrics_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_
 #define CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/metrics/leak_detector_controller.h"
 #include "chrome/browser/metrics/perf/perf_provider_chromeos.h"
+#include "components/metrics/metrics_flags.h"
 #include "components/metrics/metrics_provider.h"
 
 namespace device {
 class BluetoothAdapter;
 }
 
 namespace metrics {
 class ChromeUserMetricsExtension;
 }
 
@@ skipping 50 matching lines @@
   // Sets the Bluetooth Adapter instance used for the WriteBluetoothProto()
   // call.
   void SetBluetoothAdapter(scoped_refptr<device::BluetoothAdapter> adapter);
 
   // Writes info about paired Bluetooth devices on this system.
   void WriteBluetoothProto(metrics::SystemProfileProto* system_profile_proto);
 
   // Record the device enrollment status.
   void RecordEnrollmentStatus();
 
+  // For collecting systemwide perf data.
   metrics::PerfProvider perf_provider_;
 
+#if defined(ENABLE_LEAK_DETECTOR)
+  // For runtime memory leak detection

[Alexei Svitkine (slow), 2016/02/18 21:09:19]

Nit: Full sentences.

[Simon Que, 2016/02/19 02:13:02]

Done.

+  metrics::LeakDetectorController leak_detector_controller_;
+#endif
+
   // Bluetooth Adapter instance for collecting information about paired devices.
   scoped_refptr<device::BluetoothAdapter> adapter_;
 
   // Whether the user count was registered at the last log initialization.
   bool registered_user_count_at_log_initialization_;
 
   // The user count at the time that a log was last initialized. Contains a
   // valid value only if |registered_user_count_at_log_initialization_| is
   // true.
   uint64_t user_count_at_log_initialization_;
 
   // Hardware class (e.g., hardware qualification ID). This class identifies
   // the configured system components such as CPU, WiFi adapter, etc.
   std::string hardware_class_;
 
   base::WeakPtrFactory<ChromeOSMetricsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeOSMetricsProvider);
 };
 
 #endif  // CHROME_BROWSER_METRICS_CHROMEOS_METRICS_PROVIDER_H_