Timeline: show white overlay till page being reloaded paints

content/browser/devtools/protocol/tracing_handler.h

Index: content/browser/devtools/protocol/tracing_handler.h
diff --git a/content/browser/devtools/protocol/tracing_handler.h b/content/browser/devtools/protocol/tracing_handler.h
index 019cd9c3ebb71d729d8e60fe2b6ecad0c440bc1f..fa0d9cd311c984b70a0b3038cde6f0ec2d9b7828 100644
--- a/content/browser/devtools/protocol/tracing_handler.h
+++ b/content/browser/devtools/protocol/tracing_handler.h
@@ -54,7 +54,8 @@ class TracingHandler {
                  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);
   Response End(DevToolsCommandId command_id);
   Response GetCategories(DevToolsCommandId command);
   Response RequestMemoryDump(DevToolsCommandId command_id);