Add Custom Feeback Flag to about://flags

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 9a48b85efb8958559c1709c0e7f3b5a96c33c044..bbd79245545211068fbbb44808eb5fc7adbb1142 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14918,6 +14918,15 @@ read aloud to screenreader users to announce that a completion is available.">
         Enable Desktop to iOS promotions, and allow users to see them if they are eligible.
       </message>
     </if>
+    
+    <if expr="is_android">
+      <message name="IDS_FLAGS_ENABLE_CUSTOM_FEEDBACK_UI_NAME" desc="Name for the flag to enable custom feeback UI" translateable="false">
+        Enable Custom Feedback UI
+      </message>
+      <message name="IDS_FLAGS_ENABLE_CUSTOM_FEEDBACK_UI_DESCRIPTION" desc="Name for the flag to enable custom feeback UI">
+        Enables a custom feedback UI when submitting feedback through Google Feedback. Works with Google Play Services v10.2+
+      </message> 
+    </if>
 
     <message name="IDS_FLAGS_ENABLE_ADJUSTABLE_LARGE_CURSOR_NAME" desc="Name of the flag that enables adjustable large cursor.">
       Enable adjustable large cursor