Support offscreen contexts which own their backing surface

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index e9a64b515cdcca10ad73e2aaf61da1c77ad5ffef..d9be0ee08fd1ec4e2e58ce2b50d1c1d11a013df7 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -253,6 +253,10 @@ const base::Feature kWebRtcHWH264Encoding{
 // https://wicg.github.io/webusb
 const base::Feature kWebUsb{"WebUSB", base::FEATURE_ENABLED_BY_DEFAULT};
 
+// Enables WebVR experimental rendering optimizations.
+const base::Feature kWebVrExperimentalRendering{
+    "WebVrExperimentalRendering", base::FEATURE_DISABLED_BY_DEFAULT};

[amp, 2017/02/15 17:44:03]

WebVR has a capital 'R' in all the other places we use it.  Not sure if it makes
a huge difference, but I'm likely to misspell this on the command line if I try
to use it.

[klausw, 2017/02/15 19:47:22]

Done.

+
 // Make sendBeacon throw for a Blob with a non simple type.
 const base::Feature kSendBeaconThrowForBlobWithNonSimpleType{
     "SendBeaconThrowForBlobWithNonSimpleType",