mojo: Allow circular dependencies between structs

mojo/public/cpp/bindings/lib/template_util.h

Index: mojo/public/cpp/bindings/lib/template_util.h
diff --git a/mojo/public/cpp/bindings/lib/template_util.h b/mojo/public/cpp/bindings/lib/template_util.h
index bc459f19f222c0a722c722bd1086c449bbd3474e..c4aeb4302fe4979ec91324def2a1b0d822383e98 100644
--- a/mojo/public/cpp/bindings/lib/template_util.h
+++ b/mojo/public/cpp/bindings/lib/template_util.h
@@ -24,6 +24,11 @@ struct IsConst : FalseType {};
 template <class T>
 struct IsConst<const T> : TrueType {};
 
+template <class T>
+struct IsPointer : FalseType {};
+template <class T>
+struct IsPointer<T*> : TrueType {};
+
 template <bool B, typename T = void>
 struct EnableIf {};
 
@@ -92,6 +97,13 @@ struct IsBaseOf {
                             !IsSame<Base const, void const>::value;
 };
 
+template <class T>
+struct RemovePointer {};
+template <class T>
+struct RemovePointer<T*> {
+  typedef T type;
+};
+
 }  // namespace internal
 }  // namespace mojo