| Index: content/browser/devtools/protocol/tracing_handler.cc | 
| diff --git a/content/browser/devtools/protocol/tracing_handler.cc b/content/browser/devtools/protocol/tracing_handler.cc | 
| index 590ed9b83bcfd5b2422a51ceab56b7f332710cf9..ea5c2d44be4ed9bdd4684102a3afc8487b7437c7 100644 | 
| --- a/content/browser/devtools/protocol/tracing_handler.cc | 
| +++ b/content/browser/devtools/protocol/tracing_handler.cc | 
| @@ -193,7 +193,7 @@ void TracingHandler::Start(Maybe<std::string> categories, | 
| base::trace_event::TraceConfig trace_config; | 
| if (config.isJust()) { | 
| std::unique_ptr<base::Value> value = | 
| -        protocol::toBaseValue(config.fromJust()->serialize().get(), 1000); | 
| +        protocol::toBaseValue(config.fromJust()->toValue().get(), 1000); | 
| if (value && value->IsType(base::Value::TYPE_DICTIONARY)) { | 
| trace_config = GetTraceConfigFromDevToolsConfig( | 
| *static_cast<base::DictionaryValue*>(value.get())); | 
|  |