dbus/values_util.h: Add functions to append collection type values to message.

dbus/values_util.h

Index: dbus/values_util.h
diff --git a/dbus/values_util.h b/dbus/values_util.h
index e34c7a039db31e611fccad4be2285e07a4a3423c..9ece9b9be55b6b82b52be2ded864672b81ea7fbb 100644
--- a/dbus/values_util.h
+++ b/dbus/values_util.h
@@ -22,15 +22,37 @@ class MessageWriter;
 // double.  Non-string diciontary keys are converted to strings.
 CHROME_DBUS_EXPORT base::Value* PopDataAsValue(MessageReader* reader);
 
-// Appends a basic type value to |writer|.
+// Appends a basic type value to |writer|. Basic types are BOOLEAN, INTEGER,
+// DOUBLE, and STRING. Use this function for values that are known to be basic
+// types and to handle basic type members of collections that should not
+// have type "a{sv}" or "av". Otherwise, use AppendValueData.
 CHROME_DBUS_EXPORT void AppendBasicTypeValueData(MessageWriter* writer,
                                                  const base::Value& value);
 
-// Appends a basic type value to |writer| as a variant.
+// Appends a basic type value to |writer| as a variant. Basic types are BOOLEAN,
+// INTEGER, DOUBLE, and STRING. Use this function for values that are known to
+// be basic types and to handle basic type members of collections that should
+// not have type "a{sv}" or "av". Otherwise, use AppendValueDataAsVariant.
 CHROME_DBUS_EXPORT void AppendBasicTypeValueDataAsVariant(
     MessageWriter* writer,
     const base::Value& value);
 
+// Appends a value to |writer|. Value can be a basic type, as well as a
+// collection type, such as dictionary or list. Collections will be recursively
+// written as variant containers, i.e. dictionaries will be written with type
+// a{sv} and lists with type av. Any sub-dictionaries or sub-lists will also
+// have these types.
+CHROME_DBUS_EXPORT void AppendValueData(MessageWriter* writer,
+                                        const base::Value& value);
+
+// Appends a value to |writer| as a variant. Value can be a basic type, as well
+// as a collection type, such as dictionary or list. Collections will be
+// recursively written as variant containers, i.e. dictionaries will be written
+// with type a{sv} and lists with type av. Any sub-dictionaries or sub-lists
+// will also have these types.
+CHROME_DBUS_EXPORT void AppendValueDataAsVariant(MessageWriter* writer,
+                                                 const base::Value& value);
+
 }  // namespace dbus
 
 #endif  // DBUS_VALUES_UTIL_H_