Initial code generation for features.

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 3622237a84ae30bfb8238a07ab14859739da847f..b549bfc516f6eb347cb39f2d1cd8e9ab711787a9 100644
--- a/tools/json_schema_compiler/code.py
+++ b/tools/json_schema_compiler/code.py
@@ -63,24 +63,28 @@ class Code(object):
       self.Concat(code).Append()
     return self
 
-  def Sblock(self, line=None):
+  def Sblock(self, line=None, indent_size=None):
     """Starts a code block.
 
     Appends a line of code and then increases the indent level.
     """
+    if indent_size is None:
+      indent_size = self._indent_size;
     if line is not None:
       self.Append(line)
-    self._indent_level += self._indent_size
+    self._indent_level += indent_size
     return self
 
-  def Eblock(self, line=None):
+  def Eblock(self, line=None, indent_size=None):
     """Ends a code block by decreasing and then appending a line (or a blank
     line if not given).
     """
+    if indent_size is None:
+      indent_size = self._indent_size;
     # TODO(calamity): Decide if type checking is necessary
     #if not isinstance(line, basestring):
     #  raise TypeError
-    self._indent_level -= self._indent_size
+    self._indent_level -= indent_size
     if line is not None:
       self.Append(line)
     return self