Index: tools/telemetry/telemetry/core/platform/profiler/trace_profiler.py |
diff --git a/tools/telemetry/telemetry/core/platform/profiler/trace_profiler.py b/tools/telemetry/telemetry/core/platform/profiler/trace_profiler.py |
index 691ba639fe93601cf609619b105228b871155c6f..7a0740b674e9952e1e7bb1413e9575b086e6fc7e 100644 |
--- a/tools/telemetry/telemetry/core/platform/profiler/trace_profiler.py |
+++ b/tools/telemetry/telemetry/core/platform/profiler/trace_profiler.py |
@@ -21,7 +21,7 @@ class TraceProfiler(profiler.Profiler): |
# We always want flow events when tracing via telemetry. |
categories_with_flow = 'disabled-by-default-toplevel.flow' |
if categories: |
- categories_with_flow = ',%s' % categories |
+ categories_with_flow += ',%s' % categories |
options = tracing_options.TracingOptions() |
options.enable_chrome_trace = True |
self._browser_backend.StartTracing( |