Add a flag for developing the Chromevox Developer Option

Bug: 816369
Test: None
Change-Id: Ide3fe8d28b0e2bc9ada51f78595e0c9271ab260b
Reviewed-on: https://chromium-review.googlesource.com/1160838
Reviewed-by: David Tseng <[email protected]>
Reviewed-by: Yuki Awano <[email protected]>
Commit-Queue: Eriko Kurimoto <[email protected]>
Cr-Commit-Position: refs/heads/master@{#581814}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index da903110..feb88988 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -299,6 +299,9 @@
 extern const char kEnableCaptivePortalRandomUrl[];
 extern const char kEnableCaptivePortalRandomUrlDescription[];
 
+extern const char kEnableChromevoxDeveloperOptionName[];
+extern const char kEnableChromevoxDeveloperOptionDescription[];
+
 extern const char kEnableClientLoFiName[];
 extern const char kEnableClientLoFiDescription[];