Mojo: Add a WebSocket/Client interface and hook it up to the HTML viewer.

mojo/services/public/interfaces/network/network_service.mojom

Index: mojo/services/public/interfaces/network/network_service.mojom
diff --git a/mojo/services/public/interfaces/network/network_service.mojom b/mojo/services/public/interfaces/network/network_service.mojom
index f0ee3ef3843238d1d6e061af186826ed2b3e808f..79bfa6e828a20a7cb26271802350aa5d8198237e 100644
--- a/mojo/services/public/interfaces/network/network_service.mojom
+++ b/mojo/services/public/interfaces/network/network_service.mojom
@@ -4,6 +4,7 @@
 
 import "mojo/services/public/interfaces/network/cookie_store.mojom"
 import "mojo/services/public/interfaces/network/url_loader.mojom"
+import "mojo/services/public/interfaces/network/web_socket.mojom"
 
 module mojo {
 
@@ -12,6 +13,8 @@ interface NetworkService {
 
   GetCookieStore(CookieStore&? cookie_store);
 
+  CreateWebSocket(WebSocket& socket);
+
   // TODO(darin): Add other methods here.
 };