[Media] Added feature flag for new remote playback pipeline

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index b1904729992728cd8ae9a7a993cc12a4071ad4d2..3a01dd93eb6cf3c1b7d42b1b4e7e0adb8c178b7f 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -103325,6 +103325,7 @@ from previous Chrome versions.
   <int value="-1798337879" label="enable-md-downloads"/>
   <int value="-1797739460" label="brotli-encoding:disabled"/>
   <int value="-1790227231" label="show-autofill-signatures"/>
+  <int value="-1784788154" label="NewRemotePlaybackPipeline:disabled"/>
   <int value="-1772172557" label="enable-osk-overscroll"/>
   <int value="-1767470652" label="out-of-process-pdf"/>
   <int value="-1751928267" label="disable-icon-ntp"/>
@@ -103640,6 +103641,7 @@ from previous Chrome versions.
   <int value="-536289234" label="ssl-interstitial-v2-colorful"/>
   <int value="-535208779" label="enable-native-cups"/>
   <int value="-531810064" label="saveas-menu-label"/>
+  <int value="-531651776" label="NewRemotePlaybackPipeline:enabled"/>
   <int value="-528927088" label="AutofillCreditCardPopupLayout:disabled"/>
   <int value="-528149352" label="WebRtcUseEchoCanceller3:enabled"/>
   <int value="-519960638" label="enable-site-engagement-service"/>