Add an infobar if a session is being controlled by an automated test.

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 e9d1fe1b97ada6c81553d6738c760db56a6d3736..53d4beff750645714f8bdc4d66036759c532b7bf 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -560,6 +560,9 @@ const char kKioskMode[]                     = "kiosk";
 // See http://crbug.com/31395.
 const char kKioskModePrinting[]             = "kiosk-printing";
 
+// Comma-separated list of directories with component extensions to load.
+const char kLoadComponentExtension[]        = "load-component-extension";

[Devlin, 2017/02/01 23:05:00]

(as in extension_service.cc, let's make this a separate change)

[samuong, 2017/02/04 00:11:03]

Done.

+
 // Loads an extension from the specified directory.
 const char kLoadExtension[]                 = "load-extension";