Remove "enable-memory-benchmarking" flag

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 20eeefc2376664b5dd310e2c2421666eebcdb8f7..56dcfc251078654c62a97a781f3a36286246b182 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -407,9 +407,6 @@ const char kEnableLowResTiling[] = "enable-low-res-tiling";
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
 
-// Enables the memory benchmarking extension
-const char kEnableMemoryBenchmarking[]      = "enable-memory-benchmarking";
-
 // Enables the network information API.
 const char kEnableNetworkInformation[]      = "enable-network-information";