Simple multi-url support for mojo apps

sky/viewer/viewer.cc

Index: sky/viewer/viewer.cc
diff --git a/sky/viewer/viewer.cc b/sky/viewer/viewer.cc
index 61c92daf9a4f907f1bc2e2f29831b8efaec195a2..aa1b43b2b996b577f76a6088b903037b8df28037 100644
--- a/sky/viewer/viewer.cc
+++ b/sky/viewer/viewer.cc
@@ -44,7 +44,8 @@ class Viewer : public mojo::ApplicationDelegate,
   }
 
   virtual bool ConfigureIncomingConnection(
-      mojo::ApplicationConnection* connection) override {
+      mojo::ApplicationConnection* connection,
+      const std::string& url) override {
     connection->AddService<mojo::ContentHandler>(this);
     return true;
   }