[Media] Added feature flag for new remote playback pipeline

chrome/browser/flag_descriptions.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 2563 matching lines @@
 
 //  Background video track disabling experiment strings.
 
 const char kBackgroundVideoTrackOptimizationName[] =
     "Optimize background video playback.";
 
 const char kBackgroundVideoTrackOptimizationDescription[] =
     "Disable video tracks when the video is played in the background to "
     "optimize performance.";
 
+//  New remote playback pipeline experiment strings.
+
+const char kNewRemotePlaybackPipelineName[] =
+    "Enable the new remote playback pipeline.";
+
+const char kNewRemotePlaybackPipelineDescription[] =
+    "Enable the new pipeline for playing media element remotely via "
+    "RemotePlayback API or native controls.";
+
 //  Video fullscreen with orientation lock experiment strings.
 
 const char kVideoFullscreenOrientationLockName[] =
     "Lock screen orientation when playing a video fullscreen.";
 
 const char kVideoFullscreenOrientationLockDescription[] =
     "Lock the screen orientation of the device to match video orientation "
     "when a video goes fullscreen. Only on phones.";
 
 //  Expensive background timer throttling flag
@@ skipping 449 matching lines @@
 
 const char kAutoplayPolicyNoUserGestureRequired[] =
     "No user gesture is required.";
 
 const char kAutoplayPolicyUserGestureRequired[] = "User gesture is required.";
 
 const char kAutoplayPolicyCrossOriginUserGestureRequired[] =
     "User gesture is required for cross-origin iframes.";
 
 }  // namespace flag_descriptions