Read Chrome build ID and store it in leak reports

chrome/browser/metrics/leak_detector/leak_detector_controller.h

 // Copyright 2016 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_LEAK_DETECTOR_LEAK_DETECTOR_CONTROLLER_H_
 #define CHROME_BROWSER_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_CONTROLLER_H_
 
+#include <stdint.h>
+
 #include <vector>
 
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "components/metrics/leak_detector/leak_detector.h"
 #include "components/metrics/proto/memory_leak_report.pb.h"
 
 namespace metrics {
 
 // This class initializes the LeakDetector on the browser process and registers
@@ skipping 13 matching lines @@
 
  private:
   // All leak reports received through OnLeakFound() are stored in protobuf
   // format.
   std::vector<MemoryLeakReportProto> stored_reports_;
 
   // Contains all the parameters passed to LeakDetector. Store them in a single
   // protobuf message instead of in separate member variables.
   const MemoryLeakReportProto::Params params_;
 
+  // The build ID of the current Chrome binary.
+  std::vector<uint8_t> build_id_;
+
   // For thread safety.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(LeakDetectorController);
 };
 
 }  // namespace metrics
 
 #endif  // CHROME_BROWSER_METRICS_LEAK_DETECTOR_LEAK_DETECTOR_CONTROLLER_H_