[Tracing Clock Sync] Implement clock sync in Chrome

content/browser/tracing/battor_power_trace_provider.h

Index: content/browser/tracing/battor_power_trace_provider.h
diff --git a/content/browser/tracing/battor_power_trace_provider.h b/content/browser/tracing/battor_power_trace_provider.h
index 26ab3e01e308184f2c4402081157c455a973beed..8a9a5b5e8908c2539002db91dd081aedaa22adb4 100644
--- a/content/browser/tracing/battor_power_trace_provider.h
+++ b/content/browser/tracing/battor_power_trace_provider.h
@@ -13,13 +13,14 @@ namespace content {
 
 // This class handles the connection with the battor h/w using
 // chrome serial port interfaces.
-// TODO (aschulman) port over battor C code.
+// TODO(charliea): port over battor C code.
 class BattorPowerTraceProvider {
  public:
   BattorPowerTraceProvider();
   bool IsConnected();
   bool StartTracing();
   bool StopTracing();
+  void RecordClockSyncMarker(int sync_id);
   void GetLog(std::string* log_str);
   ~BattorPowerTraceProvider();