Add cueing proto field to support associating prompt with cues.

Bug: 452391148
Change-Id: I7d6b887db301725759d8b72c84c6a7e3bcd5c245
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7056327
Commit-Queue: Zekun Jiang <[email protected]>
Reviewed-by: Steven Holte <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1532398}

Author: Zekun Jiang

components/optimization_guide/proto/contextual_cueing_metadata.proto

@@ -63,6 +63,12 @@ message GlicCueingConfiguration {
   // This will always be non-empty.
   string cue_label = 1;
 
+  // This label will only be populated on eligible pages.
+  string dynamic_cue_label = 4;
+
+  // The text to prefill in glic if a dynamic cue is clicked.
+  string default_text = 5;
+
   // The feature to launch with the cue.
   ContextualCueingFeature cue_feature = 3;