Add flag for ChromeVox annotations feature.

Change-Id: I400cf1c6d96c95a99008d527b33863d78c546ad9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2012802
Reviewed-by: David Tseng <[email protected]>
Commit-Queue: Akihiro Ota <[email protected]>
Cr-Commit-Position: refs/heads/master@{#733774}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 2791f91e..176d948 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -3604,6 +3604,11 @@
     "Allow Linux applications to request a pointer lock, i.e. exclusive use of "
     "the mouse pointer.";
 
+const char kExperimentalAccessibilityChromeVoxAnnotationsName[] =
+    "Enable experimental ChromeVox annotations feature.";
+const char kExperimentalAccessibilityChromeVoxAnnotationsDescription[] =
+    "Allows users to create custom annotations for elements using ChromeVox.";
+
 const char kExperimentalAccessibilityChromeVoxLanguageSwitchingName[] =
     "Enable experimental ChromeVox language switching.";
 const char kExperimentalAccessibilityChromeVoxLanguageSwitchingDescription[] =