distrib: Include CREDITS.html with third-party licenses

This is the same content currently available via about:credits.

Author: magreenblatt

tools/distrib/README.footer.txt

@@ -3,6 +3,6 @@ LICENSING
 
 The CEF project is BSD licensed. Please read the LICENSE.txt file included with
 this binary distribution for licensing terms and conditions. Other software
-included in this distribution is provided under other licenses. Please visit
-"about:credits" in a CEF-based application for complete Chromium and third-party
-licensing information.
+included in this distribution is provided under other licenses. Please see the
+CREDITS.html file or visit "about:credits" in a CEF-based application for
+complete Chromium and third-party licensing information.

tools/make_distrib.py

@@ -913,6 +913,16 @@ def print_error(msg):
 build_dir_debug = os.path.join(out_dir, 'Debug' + build_dir_suffix)
 build_dir_release = os.path.join(out_dir, 'Release' + build_dir_suffix)
 
+# Transfer the about_credits.html file.
+# Debug and Release build should be the same so grab whichever exists.
+rel_path = os.path.join('gen', 'components', 'resources', 'about_credits.html')
+src_path = os.path.join(build_dir_release, rel_path)
+if not os.path.exists(src_path):
+  src_path = os.path.join(build_dir_debug, rel_path)
+  if not os.path.exists(src_path):
+    raise Exception('Missing generated resources file: %s' % rel_path)
+copy_file(src_path, os.path.join(output_dir, 'CREDITS.html'), options.quiet)
+
 if mode == 'standard' or mode == 'minimal':
   # create the include directory
   include_dir = os.path.join(output_dir, 'include')