Merge "Change usage message for trace_processor_shell."
diff --git a/src/trace_processor/trace_processor_shell.cc b/src/trace_processor/trace_processor_shell.cc
index 9496b27..4fc3dbc 100644
--- a/src/trace_processor/trace_processor_shell.cc
+++ b/src/trace_processor/trace_processor_shell.cc
@@ -286,7 +286,7 @@
 }
 
 void PrintUsage(char** argv) {
-  PERFETTO_ELOG("Usage: %s [-d] [-q query.sql] trace_file.proto", argv[0]);
+  PERFETTO_ELOG("Usage: %s [-d] [-q query.sql] trace_file.pb", argv[0]);
 }
 
 int TraceProcessorMain(int argc, char** argv) {