Source release 15.0.0

third_party/protoc.gypi

@@ -48,6 +48,7 @@
         '<(cc_dir)/<(RULE_INPUT_ROOT).pb.cc',
         '<(cc_dir)/<(RULE_INPUT_ROOT).pb.h',
       ],
+      'msvs_cygwin_shell': '0',  # Don't run action in a CYGWIN shell.
       'action': [
         '<(protoc_bin)',
         '--proto_path=<(proto_in_dir)',
@@ -55,7 +56,7 @@
         # --proto_path is a strict prefix of the path given as an argument.
         '<(proto_in_dir)/<(RULE_INPUT_ROOT)<(RULE_INPUT_EXT)',
         '--cpp_out=<(cc_dir)',
-        ],
+      ],
       'message': 'Generating C++ code from <(RULE_INPUT_PATH) ccdir=<(cc_dir)',
       'process_outputs_as_sources': 1,
     },