[mojo] Add typemap and variant support to generators

mojo/public/tools/bindings/mojom_list_outputs.py

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import argparse
 import os.path
 import sys
 
 def main():
   parser = argparse.ArgumentParser(
       description="GYP helper script for mapping mojoms => generated outputs.")
   parser.add_argument("--basedir", required=True)
+  parser.add_argument("--variant", required=True)
   parser.add_argument("mojom", nargs="*")
 
   args = parser.parse_args()
 
+  variant = args.variant if args.variant != "none" else None
+
   for mojom in args.mojom:
     full = os.path.join("<(SHARED_INTERMEDIATE_DIR)", args.basedir, mojom)
     base, ext = os.path.splitext(full)
-    assert ext == ".mojom", mojom
+
+    # Ignore non-mojom files.
+    if ext != ".mojom":
+      continue
+
     # Fix filename escaping issues on Windows.
     base = base.replace("\\", "/")
-    print base + ".mojom.cc"
-    print base + ".mojom.h"
-    print base + ".mojom-internal.h"
-    print base + ".mojom.js"
+    if variant:
+      print base + ".mojom-%s.cc" % variant
+      print base + ".mojom-%s.h" % variant
+      print base + ".mojom-%s-internal.h" % variant
+    else:
+      print base + ".mojom.cc"
+      print base + ".mojom.h"
+      print base + ".mojom-internal.h"
+      print base + ".mojom.js"
 
   return 0
 
 if __name__ == "__main__":
   sys.exit(main())