Fixing remaining VC++ 2015 64-bit build breaks

third_party/WebKit/Source/build/scripts/make_css_property_names.py

 #!/usr/bin/env python
 
 import subprocess
 import sys
 
 import css_properties
 import in_generator
 import license
 
 
@@ skipping 69 matching lines @@
 
 #include "config.h"
 #include "%(class_name)s.h"
 #include "core/css/HashTools.h"
 #include <string.h>
 
 #include "wtf/ASCIICType.h"
 #include "wtf/text/AtomicString.h"
 #include "wtf/text/WTFString.h"
 
+#ifdef _MSC_VER
+// Disable the warnings from casting a 64-bit pointer to 32-bit long

[Nico, 2015/11/16 21:31:07]

Can you say why that's safe here too?

Some of these make_ scripts have tests, but it looks like this one maybe
doesn't. If the try bots are happy, I suppose it's alright.

+// warning C4302: 'type cast': truncation from 'char (*)[28]' to 'long'
+// warning C4311: 'type cast': pointer truncation from 'char (*)[18]' to 'long'
+#pragma warning(disable : 4302 4311)
+#endif
+
 namespace blink {
 static const char propertyNameStringsPool[] = {
 %(property_name_strings)s
 };
 
 static const unsigned short propertyNameStringsOffsets[] = {
 %(property_name_offsets)s
 };
 
 %%}
@@ skipping 123 matching lines @@
         # FIXME: If we could depend on Python 2.7, we would use subprocess.check_output
         gperf_args = [self.gperf_path, '--key-positions=*', '-P', '-n']
         gperf_args.extend(['-m', '50'])  # Pick best of 50 attempts.
         gperf_args.append('-D')  # Allow duplicate hashes -> More compact code.
         gperf = subprocess.Popen(gperf_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, universal_newlines=True)
         return gperf.communicate(gperf_input)[0]
 
 
 if __name__ == "__main__":
     in_generator.Maker(CSSPropertyNamesWriter).main(sys.argv)