Add flag for testing quick app access ui

Bug=b:266734005

Low-Coverage-Reason: Code is behind a test flag, will never be enabled.
Change-Id: Ib4be9e7b2c221db257ccc6e26a5cf1a35739e6c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4472027
Reviewed-by: Toni Barzic <[email protected]>
Code-Coverage: Findit <[email protected]>
Commit-Queue: Matthew Mourgos <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1136162}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 26a8ad6..3f0130a1 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2802,6 +2802,11 @@
 const char kQuicName[] = "Experimental QUIC protocol";
 const char kQuicDescription[] = "Enable experimental QUIC protocol support.";
 
+extern const char kQuickAppAccessTestUIName[] =
+    "Internal test: quick app access";
+extern const char kQuickAppAccessTestUIDescription[] =
+    "Show an app in the quick app access area at the start of the session";
+
 const char kQuickIntensiveWakeUpThrottlingAfterLoadingName[] =
     "Quick intensive throttling after loading";
 const char kQuickIntensiveWakeUpThrottlingAfterLoadingDescription[] =