Adds some code to help isolate where crash is happening

mojo/services/network/public/cpp/web_socket_write_queue.cc

Index: mojo/services/network/public/cpp/web_socket_write_queue.cc
diff --git a/mojo/services/network/public/cpp/web_socket_write_queue.cc b/mojo/services/network/public/cpp/web_socket_write_queue.cc
index 9a0079c4609278f6b3290084ee120321477718cf..f3485d5181956a200a20f58ffb9fc47a64e14975 100644
--- a/mojo/services/network/public/cpp/web_socket_write_queue.cc
+++ b/mojo/services/network/public/cpp/web_socket_write_queue.cc
@@ -20,8 +20,10 @@ struct WebSocketWriteQueue::Operation {
 };
 
 WebSocketWriteQueue::WebSocketWriteQueue(DataPipeProducerHandle handle)
-    : handle_(handle), is_busy_(false), weak_factory_(this) {
-}
+    : handle_(handle),
+      handle_watcher_(8),
+      is_busy_(false),
+      weak_factory_(this) {}
 
 WebSocketWriteQueue::~WebSocketWriteQueue() {
 }