arc: enable Android tracing in verified-boot mode

content/browser/tracing/tracing_controller_impl.cc

Index: content/browser/tracing/tracing_controller_impl.cc
diff --git a/content/browser/tracing/tracing_controller_impl.cc b/content/browser/tracing/tracing_controller_impl.cc
index 9e49c0bec7c2d3a51070f2885887dff9293be262..f601180460498d5bf72a07e94586bb4e1a7b95fb 100644
--- a/content/browser/tracing/tracing_controller_impl.cc
+++ b/content/browser/tracing/tracing_controller_impl.cc
@@ -668,16 +668,20 @@ void TracingControllerImpl::OnEndAgentTracingAcked(
 
   if (trace_data_sink_.get() && events_str_ptr &&
       !events_str_ptr->data().empty()) {
-    if (agent_name == kETWTracingAgentName) {
-      // The Windows kernel events are kept into a JSON format stored as string
-      // and must not be escaped.
-      trace_data_sink_->AddAgentTrace(events_label, events_str_ptr->data());
-    } else if (agent_name != kArcTracingAgentName) {
-      // ARC trace data is obtained via systrace. Ignore the empty data.
-      // Quote other trace data as JSON strings and merge them into
-      // |trace_data_sink_|.
-      trace_data_sink_->AddAgentTrace(
-          events_label, base::GetQuotedJSONString(events_str_ptr->data()));
+    std::string json_string;
+    if (agent_name == kETWTracingAgentName ||
+        agent_name == kArcTracingAgentName) {
+      // The Windows kernel events and ARC Android tracing event are kept
+      // into a JSON format stored as string and must not be escaped.
+      json_string = events_str_ptr->data();
+    } else {
+      json_string = base::GetQuotedJSONString(events_str_ptr->data());
+    }
+
+    if (agent_name == kArcTracingAgentName) {
+      trace_data_sink_->AddTraceChunk(json_string);
+    } else {
+      trace_data_sink_->AddAgentTrace(events_label, json_string);
     }
   }
   std::vector<std::string> category_groups;