Overhaul JSON Schema Compiler to support a number of features required to

tools/json_schema_compiler/code.py

Index: tools/json_schema_compiler/code.py
diff --git a/tools/json_schema_compiler/code.py b/tools/json_schema_compiler/code.py
index 07f657474472ea53fc459eae33df5bcff21cc85b..2c637c587ebe4b7dc74b8a0a97c99801c9b6007a 100644
--- a/tools/json_schema_compiler/code.py
+++ b/tools/json_schema_compiler/code.py
@@ -54,6 +54,13 @@ class Code(object):
 
     return self
 
+  def Cblock(self, code):
+    """Concatenates another Code object |code| onto this one followed by a
+    blank line, if |code| is non-empty."""
+    if not code.IsEmpty():
+      self.Concat(code).Append()
+    return self
+
   def Sblock(self, line=''):
     """Starts a code block.