[Systrace] Fix systrace clock syncing issue with BattOr.

systrace/profile_chrome/perf_tracing_agent.py

Index: systrace/profile_chrome/perf_tracing_agent.py
diff --git a/systrace/profile_chrome/perf_tracing_agent.py b/systrace/profile_chrome/perf_tracing_agent.py
index c6491cd0539fb8bdd3c7da1d0ccc5c4e78b30e55..d1b0853040d581423be7352c6b6f18ca8b4b9930 100644
--- a/systrace/profile_chrome/perf_tracing_agent.py
+++ b/systrace/profile_chrome/perf_tracing_agent.py
@@ -17,6 +17,7 @@ from devil.android.perf import perf_control
 from profile_chrome import ui
 from systrace import trace_result
 from systrace import tracing_agents
+from telemetry.timeline import trace_data as trace_data_module
 
 _CATAPULT_DIR = os.path.join(
     os.path.dirname(os.path.abspath(__file__)), '..', '..')
@@ -142,6 +143,11 @@ class PerfProfilerAgent(tracing_agents.TracingAgent):
       trace_data = f.read()
     return trace_result.TraceResult('perf', trace_data)
 
+  def CollectAgentTraceData(self, trace_data_builder):
+    with open(self._PullTrace(), 'r') as f:
+      data = f.read()
+    trace_data_builder.AddTraceFor(trace_data_module.PROFILER_TRACE_PART, data)
+
   @staticmethod
   def _GetInteractivePerfCommand(perfhost_path, perf_profile, symfs_dir,
                                  required_libs, kallsyms):