Fixed browser crash when using Debug build:

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 755ff6728bea49decececdae67c64c732524541a..caebefebbbe58a6c1d807983a5bb3293e6c27322 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -562,6 +562,9 @@ const char kEnableNaClExceptionHandling[]   = "enable-nacl-exception-handling";
 // Enables the native messaging extensions API.
 const char kEnableNativeMessaging[]         = "enable-native-messaging";
 
+// Enables the network-related benchmarking extensions.
+const char kEnableNetBenchmarking[]            = "enable-net-benchmarking";
+
 // Enables the new Autofill UI, which is part of the browser process rather than
 // part of the renderer process.  http://crbug.com/51644
 const char kEnableNewAutofillUi[]           = "enable-new-autofill-ui";