Eliminate ShellClientFactoryConnection & just have the ApplicationManager do it.

mojo/shell/identity.cc

Index: mojo/shell/identity.cc
diff --git a/mojo/shell/identity.cc b/mojo/shell/identity.cc
index fef86582e1aa67af448ebfdfee68f92476db20a4..c0e12fb3b9a4536c400b4b21268fc2b75590c63d 100644
--- a/mojo/shell/identity.cc
+++ b/mojo/shell/identity.cc
@@ -53,5 +53,10 @@ bool Identity::operator<(const Identity& other) const {
   return qualifier_ < other.qualifier_;
 }
 
+Identity CreateShellIdentity() {
+  return Identity(GURL("mojo://shell/"), std::string(),
+                  GetPermissiveCapabilityFilter());
+}
+
 }  // namespace shell
 }  // namespace mojo