Update DevTools Tracing.Start to accept trace config as a parameter

content/renderer/devtools/devtools_agent.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/devtools/devtools_agent.h"
 
 #include <stddef.h>
 
 #include <map>
 
@@ skipping 123 matching lines @@
 
 bool DevToolsAgent::requestDevToolsForFrame(blink::WebLocalFrame* webFrame) {
   RenderFrameImpl* frame = RenderFrameImpl::FromWebFrame(webFrame);
   if (!frame)
     return false;
   Send(new DevToolsAgentHostMsg_RequestNewWindow(routing_id(),
       frame->GetRoutingID()));
   return true;
 }
 
-void DevToolsAgent::enableTracing(const WebString& category_filter) {
+void DevToolsAgent::enableTracingWithTraceConfig(
+    const base::trace_event::TraceConfig& trace_config) {
   // Tracing is already started by DevTools TracingHandler::Start for the
   // renderer target in the browser process. It will eventually start tracing in
   // the renderer process via IPC. But we still need a redundant
   // TraceLog::SetEnabled call here for
   // InspectorTracingAgent::emitMetadataEvents(), at which point, we are not
   // sure if tracing is already started in the renderer process.
   TraceLog* trace_log = TraceLog::GetInstance();
-  trace_log->SetEnabled(
-      base::trace_event::TraceConfig(category_filter.utf8(), ""),
-      TraceLog::RECORDING_MODE);
+  trace_log->SetEnabled(trace_config, TraceLog::RECORDING_MODE);
+}
+
+void DevToolsAgent::enableTracingWithConfigStr(
+    const WebString& devtools_style_config) {
+  base::trace_event::TraceConfig trace_config(
+      base::trace_event::TraceConfig::DevToolsToTracingStyle(
+          devtools_style_config.utf8()));
+  enableTracingWithTraceConfig(trace_config);
+}
+
+void DevToolsAgent::enableTracing(const WebString& category_filter) {
+  base::trace_event::TraceConfig trace_config(category_filter.utf8(), "");
+  enableTracingWithTraceConfig(trace_config);
 }
 
 void DevToolsAgent::disableTracing() {
   TraceLog::GetInstance()->SetDisabled();
 }
 
 void DevToolsAgent::setCPUThrottlingRate(double rate) {
   cpu_throttler_->SetThrottlingRate(rate);
 }
 
@@ skipping 135 matching lines @@
 WebDevToolsAgent* DevToolsAgent::GetWebAgent() {
   WebLocalFrame* web_frame = frame_->GetWebFrame();
   return web_frame ? web_frame->devToolsAgent() : nullptr;
 }
 
 bool DevToolsAgent::IsAttached() {
   return is_attached_;
 }
 
 }  // namespace content