[Media] Added feature flag for new remote playback pipeline

chrome/browser/flag_descriptions.h

Index: chrome/browser/flag_descriptions.h
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index ba0e2b950184bfeabc7ed8e54a2c30fd32a45f60..5d4535bc685e8242745d1b459fcd19e928f708ce 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -2803,6 +2803,14 @@ extern const char kBackgroundVideoTrackOptimizationName[];
 // Description of the flag for enabling optimizing background video playback.
 extern const char kBackgroundVideoTrackOptimizationDescription[];
 
+//  New remote playback pipeline experiment strings.
+
+// Name of the flag for enabling the new remote playback pipeline.
+extern const char kNewRemotePlaybackPipelineName[];
+
+// Description of the flag for enabling the new remote playback pipeline.
+extern const char kNewRemotePlaybackPipelineDescription[];
+
 //  Video fullscreen with orientation lock experiment strings.
 
 // Name of the flag for enabling orientation lock for fullscreen video playback.