tracing: simplify lifetime of TraceEventFilter(s)

base/trace_event/trace_event_filter_test_utils.cc

Index: base/trace_event/trace_event_filter_test_utils.cc
diff --git a/base/trace_event/trace_event_filter_test_utils.cc b/base/trace_event/trace_event_filter_test_utils.cc
index 06548b049a2f1e69d212dbef2315e8d3fd8b5bea..6687d0e0ae74329663e2b7598747ec5464124d59 100644
--- a/base/trace_event/trace_event_filter_test_utils.cc
+++ b/base/trace_event/trace_event_filter_test_utils.cc
@@ -19,15 +19,22 @@ bool TestEventFilter::filter_return_value_;
 
 // static
 std::unique_ptr<TraceEventFilter> TestEventFilter::Factory(
-    const std::string& predicate_name) {
+    const std::string& predicate_name,
+    std::unique_ptr<TraceEventFilter::Config> base_filter_config) {
   std::unique_ptr<TraceEventFilter> res;
   if (predicate_name == kName)
-    res.reset(new TestEventFilter());
+    res.reset(new TestEventFilter(std::move(base_filter_config)));
   return res;
 }
 
-TestEventFilter::TestEventFilter() {}
-TestEventFilter::~TestEventFilter() {}
+TestEventFilter::TestEventFilter(
+    std::unique_ptr<TraceEventFilter::Config> base_filter_config)
+    : TraceEventFilter(std::move(base_filter_config)) {}
+
+TestEventFilter::~TestEventFilter() {
+  if (g_hits_counter)
+    g_hits_counter->dtor_hit_count++;
+}
 
 bool TestEventFilter::FilterTraceEvent(const TraceEvent& trace_event) const {
   if (g_hits_counter)
@@ -55,6 +62,7 @@ TestEventFilter::HitsCounter::~HitsCounter() {
 void TestEventFilter::HitsCounter::Reset() {
   filter_trace_event_hit_count = 0;
   end_event_hit_count = 0;
+  dtor_hit_count = 0;
 }
 
 }  // namespace trace_event