Introduce --remote-debugging-frontend switch for custom remote debugging front-end

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 3ab7446b37641f89429f4f9d381f96f0163aa370..1aa964189a0f11c667de90d080c8e8979acbb170 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -879,6 +879,10 @@ const char kProxyServer[]                   = "proxy-server";
 // suspending never happen.
 const char kPurgeAndSuspendTime[]           = "purge-and-suspend-time";
 
+// Specifies the absolute path to the devtools front-end folder. This
+// front-end will be used for the remote debugging session.
+const char kRemoteDebuggingFrontend[] = "remote-debugging-frontend";
+
 // Porvides a list of addresses to discover DevTools remote debugging targets.
 // The format is <host>:<port>,...,<host>:port.
 const char kRemoteDebuggingTargets[] = "remote-debugging-targets";