cros: Suspend media sessions with display off trigger by tablet power button

content/browser/media/session/media_session_controllers_manager.cc

Index: content/browser/media/session/media_session_controllers_manager.cc
diff --git a/content/browser/media/session/media_session_controllers_manager.cc b/content/browser/media/session/media_session_controllers_manager.cc
index baad1185d844429b4049066a5460f59d13f482b1..c0eecf52a41c0b94548fe4ec842a98f70294503a 100644
--- a/content/browser/media/session/media_session_controllers_manager.cc
+++ b/content/browser/media/session/media_session_controllers_manager.cc
@@ -13,7 +13,9 @@ namespace content {
 namespace {
 
 bool IsMediaSessionEnabled() {
-#if defined(OS_ANDROID)
+// Media session is enabled on Android and Chrome OS to allow control of media
+// players as needed.
+#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
   return true;
 #else
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();