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

content/renderer/devtools/devtools_agent.h

 // 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.
 
 #ifndef CONTENT_RENDERER_DEVTOOLS_DEVTOOLS_AGENT_H_
 #define CONTENT_RENDERER_DEVTOOLS_DEVTOOLS_AGENT_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/trace_event/trace_config.h"
 #include "content/common/content_export.h"
 #include "content/public/common/console_message_level.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "third_party/WebKit/public/web/WebDevToolsAgentClient.h"
 
 namespace blink {
 class WebDevToolsAgent;
 }
 
 namespace content {
@@ skipping 24 matching lines @@
   blink::WebDevToolsAgent* GetWebAgent();
 
   bool IsAttached();
 
   void AddMessageToConsole(ConsoleMessageLevel level,
                            const std::string& message);
 
  private:
   friend class DevToolsAgentTest;
 
+  void enableTracingWithTraceConfig(
+      const base::trace_event::TraceConfig& trace_config);
+
   // RenderFrameObserver implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
   void WidgetWillClose() override;
 
   // WebDevToolsAgentClient implementation.
   void sendProtocolMessage(int session_id,
                            int call_id,
                            const blink::WebString& response,
                            const blink::WebString& state) override;
   blink::WebDevToolsAgentClient::WebKitClientMessageLoop*
       createClientMessageLoop() override;
   void willEnterDebugLoop() override;
   void didExitDebugLoop() override;
 
   bool requestDevToolsForFrame(blink::WebLocalFrame* frame) override;
 
+  void enableTracingWithConfigStr(
+      const blink::WebString& devtools_style_config) override;
   void enableTracing(const blink::WebString& category_filter) override;
   void disableTracing() override;
 
   void setCPUThrottlingRate(double rate) override;
 
   void OnAttach(const std::string& host_id, int session_id);
   void OnReattach(const std::string& host_id,
                   int session_id,
                   const std::string& agent_state);
   void OnDetach();
   void OnDispatchOnInspectorBackend(int session_id, const std::string& message);
   void OnInspectElement(int x, int y);
   void OnRequestNewWindowACK(bool success);
   void ContinueProgram();
   void OnSetupDevToolsClient(const std::string& compatibility_script);
 
   bool is_attached_;
   bool is_devtools_client_;
   bool paused_in_mouse_move_;
   bool paused_;
   RenderFrameImpl* frame_;
   scoped_ptr<DevToolsCPUThrottler> cpu_throttler_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsAgent);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DEVTOOLS_DEVTOOLS_AGENT_H_