Mojo: more idiomatic C++ bindings

mojo/public/cpp/bindings/type_converter.h

Index: mojo/public/cpp/bindings/type_converter.h
diff --git a/mojo/public/cpp/bindings/type_converter.h b/mojo/public/cpp/bindings/type_converter.h
index 147d83b495f2d39d918d732cd98be1616329ce05..e3e79c27f0412065d971ed3b0ca2bce7bffbc358 100644
--- a/mojo/public/cpp/bindings/type_converter.h
+++ b/mojo/public/cpp/bindings/type_converter.h
@@ -83,34 +83,11 @@ namespace mojo {
 //     output_2 = pt;
 //   }
 //
-// There is another macro to inherit implicit conversion settings from another
-// TypeConverter:
-//   MOJO_INHERIT_IMPLICIT_TYPE_CONVERSION(X, Y);
-//
-// It allows implicit conversions if and only if TypeConverter<X, Y> allows
-// implicit conversions. This is useful when defining TypeConverter for
-// container types.
-//
-// Although these macros are convenient, they make conversions less obvious.
-// Users may do conversions excessively without paying attention to the cost. So
-// please use them wisely.
 template <typename T, typename U> class TypeConverter {
-  // static T ConvertFrom(const U& input, Buffer* buf);
+  // static T ConvertFrom(const U& input);
   // static U ConvertTo(const T& input);
-
-  // Maybe (mutually exclusive):
-  // MOJO_ALLOW_IMPLICIT_TYPE_CONVERSION();
-  // MOJO_INHERIT_IMPLICIT_TYPE_CONVERSION(X, Y);
 };
 
 }  // namespace mojo
 
-#define MOJO_ALLOW_IMPLICIT_TYPE_CONVERSION() \
-  static void AssertAllowImplicitTypeConversion() {}
-
-#define MOJO_INHERIT_IMPLICIT_TYPE_CONVERSION(T, U) \
-  static void AssertAllowImplicitTypeConversion() { \
-    TypeConverter<T, U>::AssertAllowImplicitTypeConversion(); \
-  }
-
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_TYPE_CONVERTER_H_