Add external surface rendering mode

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 461d7b0d44a1a834c15b09c0f6f0211895208383..6e969e89803931a7ff018ee999d827a931c0401b 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -748,14 +748,17 @@ const char kUseMobileUserAgent[] = "use-mobile-user-agent";
 // Disable history logging for media elements.
 const char kDisableMediaHistoryLogging[]    = "disable-media-history";
 
+// Set to enable compatibility with legacy WebView synchronous APIs.
+const char kEnableWebViewSynchronousAPIs[] = "enable-webview-synchronous-apis";
+
 // Whether to run media elements in the renderer process.
 const char kMediaPlayerInRenderProcess[]    = "media-player-in-render-process";
 
 // The telephony region (ISO country code) to use in phone number detection.
 const char kNetworkCountryIso[] = "network-country-iso";
 
-// Set to enable compatibility with legacy WebView synchronous APIs.
-const char kEnableWebViewSynchronousAPIs[] = "enable-webview-synchronous-apis";
+// Render video on external surface instead of texture stream.
+const char kRenderVideoOnExternalSurface[] = "render-video-on-external-surface";
 #endif
 
 #if defined(OS_CHROMEOS)