Change mojo JS bindings to expose a handle object, which is Closed when garbage

mojo/apps/js/mojo_runner_delegate.cc

Index: mojo/apps/js/mojo_runner_delegate.cc
diff --git a/mojo/apps/js/mojo_runner_delegate.cc b/mojo/apps/js/mojo_runner_delegate.cc
index 2a6c1bd5d9ee66479b6210f766f8a16d17faa959..13081e48f3eff658d83d3f1a9e81c9809ef89739 100644
--- a/mojo/apps/js/mojo_runner_delegate.cc
+++ b/mojo/apps/js/mojo_runner_delegate.cc
@@ -15,6 +15,7 @@
 #include "mojo/apps/js/bindings/monotonic_clock.h"
 #include "mojo/apps/js/bindings/threading.h"
 #include "mojo/bindings/js/core.h"
+#include "mojo/bindings/js/handle.h"
 #include "mojo/bindings/js/support.h"
 
 namespace mojo {
@@ -39,7 +40,8 @@ void StartCallback(base::WeakPtr<gin::Runner> runner,
   v8::Handle<v8::Function> start;
   CHECK(gin::ConvertFromV8(isolate, module, &start));
 
-  v8::Handle<v8::Value> args[] = { gin::ConvertToV8(isolate, pipe) };
+  v8::Handle<v8::Value> args[] = {
+      gin::ConvertToV8(isolate, mojo::Handle(pipe)) };
   runner->Call(start, runner->global(), 1, args);
 }