Tracing pre-filtering

content/app/content_main_runner.cc

Index: content/app/content_main_runner.cc
diff --git a/content/app/content_main_runner.cc b/content/app/content_main_runner.cc
index abe4f13051c45db0ac11f31e7ef09b59fe3f618b..dde2b6977e1550cfed840eedb113aade8decfd59 100644
--- a/content/app/content_main_runner.cc
+++ b/content/app/content_main_runner.cc
@@ -547,6 +547,14 @@ class ContentMainRunnerImpl : public ContentMainRunner {
 #endif
 
 #if !defined(OS_ANDROID)
+    // TEMP
+    base::trace_event::TraceConfig trace_config(
+        "", base::trace_event::RECORD_UNTIL_FULL);
+
+    base::trace_event::TraceLog::GetInstance()->SetEnabled(
+        trace_config, base::trace_event::TraceLog::RECORDING_MODE);
+    // TEMP
+
     // Enable startup tracing asap to avoid early TRACE_EVENT calls being
     // ignored. For Android, startup tracing is enabled in an even earlier place
     // content/app/android/library_loader_hooks.cc.