Implement system tracing for cros

content/browser/tracing/tracing_ui.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/browser/tracing/tracing_ui.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 270 matching lines @@
 
 TracingUI::~TracingUI() {
   TracingControllerImpl::GetInstance()->UnregisterTracingUI(this);
 }
 
 void TracingUI::OnMonitoringStateChanged(bool is_monitoring) {
   web_ui()->CallJavascriptFunction(
       "onMonitoringStateChanged", base::FundamentalValue(is_monitoring));
 }
 
+void TracingUI::OnSystemTraceDataCollected(
+    const scoped_refptr<base::RefCountedString>& events_str_ptr) {
+  web_ui()->CallJavascriptFunction(

[dsinclair, 2014/01/30 14:36:06]

Don't think we want to send this back as JS, but instead in the JSON file.

+      "tracingController.onSystemTraceDataCollected",
+      *scoped_ptr<base::Value>(new base::StringValue(events_str_ptr->data())));
+}
+
 }  // namespace content