Initial commit of the Dart Chrome Extension APIs generators

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 009eb12f16953c80616f29ab3d9d3d8df374ac58..5aa4fb800971f13d737fe292f0afda677f440ee7 100644
--- a/tools/json_schema_compiler/code.py
+++ b/tools/json_schema_compiler/code.py
@@ -68,7 +68,8 @@ class Code(object):
 
     Appends a line of code and then increases the indent level.
     """
-    self.Append(line)
+    if line is not None:
+      self.Append(line)
     self._indent_level += self._indent_size
     return self
 
@@ -80,7 +81,8 @@ class Code(object):
     #if not isinstance(line, basestring):
     #  raise TypeError
     self._indent_level -= self._indent_size
-    self.Append(line)
+    if line is not None:
+      self.Append(line)
     return self
 
   def Comment(self, comment, comment_prefix='// '):