WIP: The tracing service prototype

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index 4c231deda83f1e105563fbe824e2b7dd8ec2b451..03fcb39608ea3195111b229ca463120566828a64 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -9,6 +9,7 @@
 #include <utility>
 
 #include "base/base_switches.h"
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/debug/leak_annotations.h"
@@ -67,6 +68,8 @@
 #include "mojo/public/cpp/system/platform_handle.h"
 #include "services/device/public/cpp/power_monitor/power_monitor_broadcast_source.h"
 #include "services/resource_coordinator/public/cpp/memory/process_local_dump_manager_impl.h"
+#include "services/resource_coordinator/public/cpp/tracing/chrome_agent.h"
+#include "services/resource_coordinator/public/interfaces/tracing/tracing.mojom.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/interface_provider.h"
 #include "services/service_manager/runner/common/client_util.h"
@@ -482,11 +485,16 @@ void ChildThreadImpl::Init(const Options& options) {
   if (!IsInBrowserProcess()) {
     // In single process mode, browser-side tracing and memory will cover the
     // whole process including renderers.
-    channel_->AddFilter(new tracing::ChildTraceMessageFilter(
-        ChildProcess::current()->io_task_runner()));
+    // channel_->AddFilter(new tracing::ChildTraceMessageFilter(
+    //     ChildProcess::current()->io_task_runner()));
     channel_->AddFilter(new ChildMemoryMessageFilter());
 
     if (service_manager_connection_) {
+      resource_coordinator::tracing::mojom::AgentSetPtr agent_set;
+      GetConnector()->BindInterface("tracing", mojo::MakeRequest(&agent_set));
+      resource_coordinator::tracing::ChromeAgent::InitializeIfNeeded(
+          std::move(agent_set));
+
       memory_instrumentation::ProcessLocalDumpManagerImpl::Config config(
           GetConnector(), mojom::kBrowserServiceName);
       memory_instrumentation::ProcessLocalDumpManagerImpl::CreateInstance(