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

components/infobars/core/infobar_delegate.h

Index: components/infobars/core/infobar_delegate.h
diff --git a/components/infobars/core/infobar_delegate.h b/components/infobars/core/infobar_delegate.h
index 03fdf1e9707e1d7c6718ab3095af17fa7b99de86..a596f5284a6e0979b72f8d104724a5544b2baef2 100644
--- a/components/infobars/core/infobar_delegate.h
+++ b/components/infobars/core/infobar_delegate.h
@@ -144,6 +144,7 @@ class InfoBarDelegate {
     GROUPED_PERMISSION_INFOBAR_DELEGATE_ANDROID = 70,
     OFFLINE_PAGE_INFOBAR_DELEGATE = 71,
     SEARCH_GEOLOCATION_DISCLOSURE_INFOBAR_DELEGATE = 72,
+    CHROMEDRIVER_INFOBAR_DELEGATE = 73,

[Peter Kasting, 2017/02/13 23:16:52]

You also need to add a corresponding histogram value.

[samuong, 2017/02/14 00:19:17]

I'm not very familiar with histograms. I've added an entry in
tools/metrics/histograms/histograms.xml, does this need anything else?

[Peter Kasting, 2017/02/14 00:23:17]

I think that's all you need, but you'll need signoff from a histograms OWNER
(and they can double-check).

   };
 
   // Describes navigation events, used to decide whether infobars should be