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

content/public/common/content_switches.h

Index: content/public/common/content_switches.h
diff --git a/content/public/common/content_switches.h b/content/public/common/content_switches.h
index 2058361212a3ea7d15f751d95d9f0603da67b64d..333e881b53f768999b9a99a6d97a7bf6a36a4f5a 100644
--- a/content/public/common/content_switches.h
+++ b/content/public/common/content_switches.h
@@ -109,6 +109,7 @@ CONTENT_EXPORT extern const char kDisableZeroCopyDxgiVideo[];
 CONTENT_EXPORT extern const char kDomAutomationController[];
 extern const char kDisable2dCanvasClipAntialiasing[];
 CONTENT_EXPORT extern const char kEnableAggressiveDOMStorageFlushing[];
+extern const char kEnableChromeDriver[];

[Devlin, 2017/02/06 16:20:22]

Is this needed in the content/ layer?  Or can this go in
chrome/common/chrome_switches.h?

[samuong, 2017/02/07 19:11:10]

For this specific CL, it could go in either content/ or chrome/.

But ChromeDriver can drive content shell, and in the future I'd like to be able
to add other features to this switch, such as exposing synthetic inputs to
ChromeDriver. Other content embedders might also want to know whether they're
running in a WebDriver context.

 CONTENT_EXPORT extern const char kEnablePreferCompositingToLCDText[];
 CONTENT_EXPORT extern const char kEnableBlinkFeatures[];
 CONTENT_EXPORT extern const char kEnableBrowserSideNavigation[];