report.format_html now ignores APIs not passed to it.

src/report/report.py

 #!/usr/bin/env python2
 # -*- coding: utf-8 -*-
 
 # Copyright 2016 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
@@ skipping 250 matching lines @@
     # member with an independent status and set the status of the whole match
     # to that.
     match_group = match.group(1)[1:]  # Slice off the leading dot.
     if ('.' not in match_group or
         (match_group.count('.') == 1 and
          match_group.split('.', 1)[0] in {'app', 'sockets', 'system'})):
       # This match is either a standalone API (chrome.api) or a special
       # standalone API (chrome.superapi.api) and we can just take the top-level
       # status of the API.
       api = match_group
+
+      if api not in apis:
+        return match.group(0)
+
       status = apis[api]['status']
       return '<span class="ca-feature {}">{}</span>'.format(
           status, match.group(0))
 
     api, member = chrome_app.apis.CHROME_API_AND_MEMBER_REGEX.match(
       match.group(0)).groups()
 
+    if api not in apis:
+      return match.group(0)
+
     status = None
     while True:
       # Check if the member has a status; if it does, use that, otherwise jump
       # to the parent member.
       for warning in apis[api]['warnings']:
         if member == warning:
           status = Status.NONE
           break
 
         try:
@@ skipping 93 matching lines @@
   """
   report = generate(chrome_app_manifest, apis, status, warnings, web_path,
                     boilerplate_dir)
   report_path = os.path.join(report_dir, 'report.html')
   with open(report_path, 'w') as report_file:
     logging.info('Writing conversion report to `%s`.', report_path)
     report_file.write(surrogateescape.encode(report))
   copy_css(report_dir)
   install_bower_dependencies(['lato', 'inconsolata', 'code-prettify'],
                              report_dir)