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

chrome/browser/ui/extensions/extension_message_bubble_factory.cc

Index: chrome/browser/ui/extensions/extension_message_bubble_factory.cc
diff --git a/chrome/browser/ui/extensions/extension_message_bubble_factory.cc b/chrome/browser/ui/extensions/extension_message_bubble_factory.cc
index ddbfadf60e28dcca2f43f6d58079547727e2420d..838b02941bd817e93d0cce1604c895ea06a179cb 100644
--- a/chrome/browser/ui/extensions/extension_message_bubble_factory.cc
+++ b/chrome/browser/ui/extensions/extension_message_bubble_factory.cc
@@ -21,6 +21,7 @@
 #include "chrome/browser/ui/startup/startup_browser_creator.h"
 #include "chrome/common/channel_info.h"
 #include "components/version_info/version_info.h"
+#include "content/public/common/content_switches.h"
 #include "extensions/common/feature_switch.h"
 
 namespace {
@@ -89,6 +90,10 @@ bool EnableDevModeBubble() {
     return true;
 #endif
 
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kEnableChromeDriver))
+    return false;

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

On Windows beta and stable, we've already returned true by this point (line 90).

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

Done.

+
   return g_override_for_testing ==
              ExtensionMessageBubbleFactory::OVERRIDE_ENABLED ||
          IsExperimentEnabled(kEnableDevModeWarningExperimentName);