| Index: components/metrics/BUILD.gn
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| diff --git a/components/metrics/BUILD.gn b/components/metrics/BUILD.gn
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| index 8a3e0cc25377030034d580329d33700843e4e42a..ccfd2438ba818a3456a280a3faf7fedab4aa42d8 100644
 | 
| --- a/components/metrics/BUILD.gn
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| +++ b/components/metrics/BUILD.gn
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| @@ -122,6 +122,7 @@ source_set("profiler") {
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|      "profiler/profiler_metrics_provider.h",
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|      "profiler/tracking_synchronizer.cc",
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|      "profiler/tracking_synchronizer.h",
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| +    "profiler/tracking_synchronizer_observer.cc",
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|      "profiler/tracking_synchronizer_observer.h",
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|    ]
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|  
 | 
| 
 |