metrics: Add leak detector controller in Chrome OS metrics system

chrome/browser/metrics/chromeos_metrics_provider.h

Index: chrome/browser/metrics/chromeos_metrics_provider.h
diff --git a/chrome/browser/metrics/chromeos_metrics_provider.h b/chrome/browser/metrics/chromeos_metrics_provider.h
index 680c17ae3963f4a4d0186bb66a980511d92d9b43..8506d4dfd9282339bccdbe37f7cf88488382b922 100644
--- a/chrome/browser/metrics/chromeos_metrics_provider.h
+++ b/chrome/browser/metrics/chromeos_metrics_provider.h
@@ -9,6 +9,7 @@
 
 #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_provider.h"
 
@@ -81,8 +82,12 @@ class ChromeOSMetricsProvider : public metrics::MetricsProvider {
   // Record the device enrollment status.
   void RecordEnrollmentStatus();
 
+  // For collecting systemwide perf data.
   metrics::PerfProvider perf_provider_;
 
+  // Enables runtime memory leak detection and gets notified of leak reports.
+  scoped_ptr<metrics::LeakDetectorController> leak_detector_controller_;
+
   // Bluetooth Adapter instance for collecting information about paired devices.
   scoped_refptr<device::BluetoothAdapter> adapter_;