Timeline: show white overlay till page being reloaded paints

content/browser/devtools/protocol/tracing_handler.cc

 // Copyright 2014 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/devtools/protocol/tracing_handler.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/format_macros.h"
@@ skipping 149 matching lines @@
   client_->TracingComplete(
       TracingCompleteParams::Create()->set_stream(stream_handle));
 }
 
 Response TracingHandler::Start(
     DevToolsCommandId command_id,
     const std::string* categories,
     const std::string* options,
     const double* buffer_usage_reporting_interval,
     const std::string* transfer_mode,
-    const std::unique_ptr<base::DictionaryValue>& config) {
+    const std::unique_ptr<base::DictionaryValue>& config,
+    const std::string* reloadingBannerMessage) {
   if (IsTracing()) {
     if (!did_initiate_recording_ && IsStartupTracingActive()) {
       // If tracing is already running because it was initiated by startup
       // tracing, honor the transfer mode update, as that's the only way
       // for the client to communicate it.
       return_as_stream_ =
           transfer_mode && *transfer_mode == start::kTransferModeReturnAsStream;
     }
     return Response::InternalError("Tracing is already started");
   }
@@ skipping 164 matching lines @@
   std::string mode;
   if (tracing_dict->GetString(kRecordModeParam, &mode))
     tracing_dict->SetString(kRecordModeParam, ConvertFromCamelCase(mode, '-'));
 
   return base::trace_event::TraceConfig(*tracing_dict);
 }
 
 }  // namespace tracing
 }  // namespace devtools
 }  // namespace content