CC: Add 'cc-benchmark' traces for minimal tracing in benchmarks.

base/message_loop/message_pump_gtk.cc

Index: base/message_loop/message_pump_gtk.cc
diff --git a/base/message_loop/message_pump_gtk.cc b/base/message_loop/message_pump_gtk.cc
index 007434232116b91dd6bdf44dab99b92f97bc5e1f..93f02964567653464eec37d456f0d6699cbff5d3 100644
--- a/base/message_loop/message_pump_gtk.cc
+++ b/base/message_loop/message_pump_gtk.cc
@@ -71,7 +71,7 @@ MessagePumpGtk::~MessagePumpGtk() {
 }
 
 void MessagePumpGtk::DispatchEvents(GdkEvent* event) {
-  UNSHIPPED_TRACE_EVENT1("toplevel", "MessagePumpGtk::DispatchEvents",
+  UNSHIPPED_TRACE_EVENT1("task", "MessagePumpGtk::DispatchEvents",
                          "type", EventToTypeString(event));
 
   WillProcessEvent(event);