Convert tabs, windows, and extension APIs to feature system.

tools/json_schema_compiler/compiler.py

Index: tools/json_schema_compiler/compiler.py
diff --git a/tools/json_schema_compiler/compiler.py b/tools/json_schema_compiler/compiler.py
index 38235e07f9c9833705f99c341b718ad1db3fdb11..ee33c2c2e2f3c0f2366f4d486dff1c854ef4dd34 100755
--- a/tools/json_schema_compiler/compiler.py
+++ b/tools/json_schema_compiler/compiler.py
@@ -53,13 +53,16 @@ def handle_single_schema(filename, dest_dir, root, root_namespace):
     # Load type dependencies into the model.
     # TODO(miket): do we need this in IDL?
     for referenced_schema in referenced_schemas:
-      referenced_schema_path = os.path.join(
-          os.path.dirname(schema), referenced_schema + '.json')
-      referenced_api_defs = json_schema.Load(referenced_schema_path)
-
-      for namespace in referenced_api_defs:
-        api_model.AddNamespace(namespace,
-            os.path.relpath(referenced_schema_path, opts.root))
+      parts = referenced_schema.split(':')
+      api_name = parts[-1]
+      if len(parts) == 1 or parts[0] == 'api':
+        referenced_schema_path = os.path.join(
+            os.path.dirname(schema), api_name + '.json')
+        referenced_api_defs = json_schema.Load(referenced_schema_path)
+
+        for namespace in referenced_api_defs:
+          api_model.AddNamespace(namespace,
+              os.path.relpath(referenced_schema_path, opts.root))
 
     # Gets the relative path from opts.root to the schema to correctly determine
     # the include path.