Add a chrome://flags entry for experimental productivity features

Bug: 837344
Change-Id: Ie1367ed1c12c714bad4d6aa28aa989b2a712c309
Reviewed-on: https://chromium-review.googlesource.com/1030841
Commit-Queue: Ian Clelland <[email protected]>
Reviewed-by: John Abd-El-Malek <[email protected]>
Cr-Commit-Position: refs/heads/master@{#555968}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index d69510e..a37dc74 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -455,6 +455,9 @@
 extern const char kExperimentalKeyboardLockUiName[];
 extern const char kExperimentalKeyboardLockUiDescription[];
 
+extern const char kExperimentalProductivityFeaturesName[];
+extern const char kExperimentalProductivityFeaturesDescription[];
+
 extern const char kExperimentalSecurityFeaturesName[];
 extern const char kExperimentalSecurityFeaturesDescription[];