Puts the new Material Design User Manager behind a flag

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index ceec21c5be63163451323313185df7b879673514..d1e23a2424745031f0e02e06421b420c1ab5f6dd 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -12999,6 +12999,12 @@ Please check your email at <ph name="ACCOUNT_EMAIL">$2<ex>jane.doe@gmail.com</ex
       <message name="IDS_FLAGS_ENABLE_PASSWORD_SEPARATED_SIGNIN_FLOW_DESCRIPTION" desc="Description for the flag to enable the new gaia password-separated sign in flow.">
         When enabled, signing in to the browser will use a new gaia password-separated sign in flow.
       </message>
+      <message name="IDS_FLAGS_ENABLE_MATERIAL_DESIGN_USER_MANAGER_NAME" desc="Title for the flag to enable the new material design user manager.">
+        Enable Material Design User Manager
+      </message>
+      <message name="IDS_FLAGS_ENABLE_MATERIAL_DESIGN_USER_MANAGER_DESCRIPTION" desc="Description for the flag to enable the new material design user manager.">
+        When enabled, the Switch person button in the avatar menu launches the new Material Design user manager.
+      </message>
 
       <message name="IDS_FLAGS_GOOGLE_PROFILE_INFO_NAME" desc="Title for the flag to enable the google profile information">
         Google profile name and icon