Make it possible to configure synthetic delays through Devtools

content/browser/devtools/devtools_protocol_constants.cc

Index: content/browser/devtools/devtools_protocol_constants.cc
diff --git a/content/browser/devtools/devtools_protocol_constants.cc b/content/browser/devtools/devtools_protocol_constants.cc
index ff0357b8425c395599f26d45c89fd4124ae3d413..7478bea564c2b521f57acfbe6baedc8e889d8e1a 100644
--- a/content/browser/devtools/devtools_protocol_constants.cc
+++ b/content/browser/devtools/devtools_protocol_constants.cc
@@ -192,6 +192,15 @@ namespace dataCollected {
   const char kValue[] = "value";
 }
 
+namespace configureSyntheticDelays {
+  const char kName[] = "Tracing.configureSyntheticDelays";
+  const char kDelays[] = "delays";
+}
+
+namespace configureSyntheticDelaysComplete {
+  const char kName[] = "Tracing.configureSyntheticDelaysComplete";
+}
+
 }  // Tracing
 
 namespace SystemInfo {