Improve inheritance support in the CEF API (issue #1623).

- Support single parent inheritance in CEF API classes.
- Support non-virtual inheritance in CEF API classes.
- Support translation of CEF API sub-directories.
- Add test sub-directories for testing-only functionality that will be
  available to unit tests but not exposed via the binary distribution.
- Add unit tests for the translator tool.
- Fix parsing of template parameter types that include commas.

tools/make_distrib.py

@@ -120,6 +120,9 @@ def transfer_gypi_files(src_dir, gypi_paths, gypi_path_prefix, dst_dir, quiet):
     # skip gyp includes
     if path[:2] == '<@':
         continue
+    # skip test files
+    if path.find('/test/') >= 0:
+        continue
     src = os.path.join(src_dir, path)
     dst = os.path.join(dst_dir, path.replace(gypi_path_prefix, ''))
     dst_path = os.path.dirname(dst)