Feature flag for link to text UI revamp

This CL adds a feature flag for the link to text UI revamp on android.

Bug: 1176278
Change-Id: Ie1f586d4a0571891a77f01da319cac458a5e12dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2684934
Commit-Queue: Cheick Cisse <[email protected]>
Reviewed-by: Gayane Petrosyan <[email protected]>
Cr-Commit-Position: refs/heads/master@{#852949}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 183403e6..1bb6056 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2621,6 +2621,11 @@
     "restrictions make it unlikely that a URL can be generated and actually "
     "work when shared.";
 
+const char kPreemtiveLinkToTextGenerationName[] =
+    "Preemptive generation of link to text";
+const char kPreemtiveLinkToTextGenerationDescription[] =
+    "Enables link to text to be generated in advance.";
+
 // Android ---------------------------------------------------------------------
 
 #if defined(OS_ANDROID)