Projector: Add local playback feature flag to chrome://flags

This CL adds ProjectorLocalPlayback and ProjectorAppDebug flags to
chrome://flags to facilitate our team's bug bash and development ease.

Our PM has indicated that confidentiality is not a concern for this
new feature.

Bug: b:237089852
Change-Id: Idd54b420338e5701bd4a2d17a69986bed1de1d76
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3828201
Auto-Submit: Toby Huang <[email protected]>
Commit-Queue: Toby Huang <[email protected]>
Reviewed-by: Yilkal Abe <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1034560}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 3c0c70c2..da09a00 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -5631,12 +5631,21 @@
 
 const char kProjectorAnnotatorName[] = "Enable Projector annotator";
 const char kProjectorAnnotatorDescription[] =
-    "Turns on annotator tools when recording a screen capture using projector";
+    "Turns on annotator tools when recording a screen capture using Projector";
 
 const char kProjectorExcludeTranscriptName[] =
     "Enable Projector exclude transcript feature";
 const char kProjectorExcludeTranscriptDescription[] =
-    "Support excluding segment of Projector recording by excluding transcript";
+    "Supports excluding segment of Projector recording by excluding transcript";
+
+const char kProjectorLocalPlaybackName[] = "Enable Projector local playback";
+const char kProjectorLocalPlaybackDescription[] =
+    "Supports streaming screencast videos from DriveFS instead of Drive before "
+    "they have finished transcoding";
+
+const char kProjectorAppDebugName[] = "Enable Projector app debug";
+const char kProjectorAppDebugDescription[] =
+    "Adds more informative error messages to the Projector app for debugging";
 
 const char kQsRevampName[] = "Quick Settings Revamp";
 const char kQsRevampDescription[] =