Mojo: Add BindingsSupportImpl on top of HandleWatcher

mojo/shell/context.cc

Index: mojo/shell/context.cc
diff --git a/mojo/shell/context.cc b/mojo/shell/context.cc
index c2e2f9043194b6557de0c385c21a138d86a7b6a5..6a4be90789828ec6b7faa9d7498b988a2b0a34bc 100644
--- a/mojo/shell/context.cc
+++ b/mojo/shell/context.cc
@@ -18,9 +18,11 @@ Context::Context()
               scoped_ptr<net::NetworkDelegate>(new NetworkDelegate()),
               storage_.profile_path()) {
   system::CoreImpl::Init();
+  BindingsSupport::Set(&bindings_support_impl_);
 }
 
 Context::~Context() {
+  BindingsSupport::Set(NULL);
 }
 
 }  // namespace shell