Read Chrome build ID and store it in leak reports

components/metrics/leak_detector/gnu_build_id_reader.h

Index: components/metrics/leak_detector/gnu_build_id_reader.h
diff --git a/components/metrics/leak_detector/gnu_build_id_reader.h b/components/metrics/leak_detector/gnu_build_id_reader.h
new file mode 100644
index 0000000000000000000000000000000000000000..5cda9f3869a3fe7c7ffd83b1929777cdc87077c2
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+++ b/components/metrics/leak_detector/gnu_build_id_reader.h
@@ -0,0 +1,24 @@
+// 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 COMPONENTS_METRICS_LEAK_DETECTOR_GNU_BUILD_ID_READER_H_
+#define COMPONENTS_METRICS_LEAK_DETECTOR_GNU_BUILD_ID_READER_H_
+
+#include <stdint.h>
+
+#include <vector>
+
+namespace metrics {
+namespace leak_detector {
+namespace gnu_build_id_reader {
+
+// Reads the build ID from the GNU build notes and stores it in |*build_id|.
+// Returns true if it was successfully read, or false otherwise.
+bool ReadBuildID(std::vector<uint8_t>* build_id);
+
+}  // namespace gnu_build_id_reader
+}  // namespace leak_detector
+}  // namespace metrics
+
+#endif  // COMPONENTS_METRICS_LEAK_DETECTOR_GNU_BUILD_ID_READER_H_