add ENABLE_WEB_SOCKETS

build/features_override.gypi

Index: build/features_override.gypi
diff --git a/build/features_override.gypi b/build/features_override.gypi
index 202370587247af2472d3d46797613a497987ad6f..80cbe8d8a740d33b80a51d67b11bfa908da3b80d 100644
--- a/build/features_override.gypi
+++ b/build/features_override.gypi
@@ -32,10 +32,11 @@
       'ENABLE_SVG_FOREIGN_OBJECT=1',
       'ENABLE_SVG_FONTS=1',
       'ENABLE_VIDEO=1',
+      'ENABLE_WEB_SOCKETS=1',
       'ENABLE_WORKERS=1',
     ],
     # TODO: If the need arises, create a mechanism that will intelligently
     # merge the lists rather than replace one with the other. This may
     # require changes in gyp.
   },
-}
+}