Add the webview zygote socket to the zygote whitelist.

Allow the webview zygote socket to be open at time of fork, so that
webview renderers can be forked successfully.

Test: WebView functions correctly with multiprocess dev setting enabled
Bug: 21643067
Change-Id: I312846433a43a8e4548cb2f98b96b56acf9f5333
diff --git a/core/jni/fd_utils-inl.h b/core/jni/fd_utils-inl.h
index af27069..b78b8ff 100644
--- a/core/jni/fd_utils-inl.h
+++ b/core/jni/fd_utils-inl.h
@@ -51,6 +51,7 @@
   "/dev/null",
   "/dev/socket/zygote",
   "/dev/socket/zygote_secondary",
+  "/dev/socket/webview_zygote",
   "/sys/kernel/debug/tracing/trace_marker",
   "/system/framework/framework-res.apk",
   "/dev/urandom",