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

chrome/browser/ui/startup/startup_browser_creator_impl.cc

Index: chrome/browser/ui/startup/startup_browser_creator_impl.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator_impl.cc b/chrome/browser/ui/startup/startup_browser_creator_impl.cc
index 1b5e7da057378d8b1f72c349beac791d670feeeb..eb225ef8ab3e6468eee0bfc42516797c0038e4d5 100644
--- a/chrome/browser/ui/startup/startup_browser_creator_impl.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator_impl.cc
@@ -68,6 +68,7 @@
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "chrome/browser/ui/session_crashed_bubble.h"
 #include "chrome/browser/ui/startup/bad_flags_prompt.h"
+#include "chrome/browser/ui/startup/chromedriver_infobar_delegate.h"
 #include "chrome/browser/ui/startup/default_browser_prompt.h"
 #include "chrome/browser/ui/startup/google_api_keys_infobar_delegate.h"
 #include "chrome/browser/ui/startup/obsolete_system_infobar_delegate.h"
@@ -800,11 +801,15 @@ void StartupBrowserCreatorImpl::AddInfoBarsIfNecessary(
     SessionCrashedInfoBarDelegate::Create(browser);
   }
 
+  if (command_line_.HasSwitch(switches::kEnableChromeDriver))
+    ChromeDriverInfoBarDelegate::Create(browser);

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

This is pretty high-level.  I wonder if we could put this a little lower in the
stack?  Someone in c/b/ui/startup owners could say for sure if this is the right
place (it *does* have other infobars, but they're a little more
startup-related).

+
   // The below info bars are only added to the first profile which is launched.
   // Other profiles might be restoring the browsing sessions asynchronously,
   // so we cannot add the info bars to the focused tabs here.
   if (is_process_startup == chrome::startup::IS_PROCESS_STARTUP &&
-      !command_line_.HasSwitch(switches::kTestType)) {
+      !command_line_.HasSwitch(switches::kTestType) &&
+      !command_line_.HasSwitch(switches::kEnableChromeDriver)) {
     chrome::ShowBadFlagsPrompt(browser);
     GoogleApiKeysInfoBarDelegate::Create(InfoBarService::FromWebContents(
         browser->tab_strip_model()->GetActiveWebContents()));