Implement system tracing for cros

content/browser/tracing/tracing_ui.cc

Index: content/browser/tracing/tracing_ui.cc
diff --git a/content/browser/tracing/tracing_ui.cc b/content/browser/tracing/tracing_ui.cc
index 6ef08e3c7598537109f018c0b49488b822650aa9..00cbf7dd56d996dca8acaa1e3ef9193e390af18a 100644
--- a/content/browser/tracing/tracing_ui.cc
+++ b/content/browser/tracing/tracing_ui.cc
@@ -288,4 +288,11 @@ void TracingUI::OnMonitoringStateChanged(bool is_monitoring) {
       "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