[tracing] Send smaps file desciptor to child process for tracing

base/trace_event/trace_config.cc

Index: base/trace_event/trace_config.cc
diff --git a/base/trace_event/trace_config.cc b/base/trace_event/trace_config.cc
index 9f0367bd2a21b09789ac81f060639f375caf1f73..6d03f5b8ba29a3ea728dc53300ad06e22c1574fc 100644
--- a/base/trace_event/trace_config.cc
+++ b/base/trace_event/trace_config.cc
@@ -252,6 +252,16 @@ void TraceConfig::Clear() {
   memory_dump_config_.clear();
 }
 
+bool TraceConfig::IsDetailedMemoryDumpEnabled() const {
+  if (IsCategoryEnabled(MemoryDumpManager::kTraceCategory)) {
+    for (const MemoryDumpTriggerConfig& config : memory_dump_config_) {
+      if (config.level_of_detail == MemoryDumpLevelOfDetail::DETAILED)
+        return true;
+    }
+  }
+  return false;
+}
+
 void TraceConfig::InitializeDefault() {
   record_mode_ = RECORD_UNTIL_FULL;
   enable_sampling_ = false;