Support JSON Schema properties with values in the JSON Schema Compiler.

tools/json_schema_compiler/cpp_type_generator.py

Index: tools/json_schema_compiler/cpp_type_generator.py
diff --git a/tools/json_schema_compiler/cpp_type_generator.py b/tools/json_schema_compiler/cpp_type_generator.py
index 5a573b65a269f16f3cd05995fe2583028ef6a338..944dba9f1d88e203e60e4d06d37d0d9c4f990187 100644
--- a/tools/json_schema_compiler/cpp_type_generator.py
+++ b/tools/json_schema_compiler/cpp_type_generator.py
@@ -252,11 +252,15 @@ class CppTypeGenerator(object):
       c.Comment(prop.description)
 
     if prop.value is not None:
+      cpp_type = self.GetCppType(prop.type_)
+      cpp_value = prop.value
+      if cpp_type == 'std::string':
+        cpp_value = '"%s"' % cpp_type
       c.Append(line % {
-          "type": self.GetCppType(prop.type_),
-          "name": prop.name,
-          "value": prop.value
-        })
+        "type": cpp_type,
+        "name": prop.name,
+        "value": cpp_value
+      })
     else:
       has_child_code = False
       c.Sblock('namespace %s {' % prop.name)