Fixing remaining VC++ 2015 64-bit build breaks

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

 #!/usr/bin/env python
 
 import os.path
 import re
 import subprocess
 import sys
 
 from in_file import InFile
 from name_utilities import upper_first_letter
 import in_generator
@@ skipping 28 matching lines @@
 
 GPERF_TEMPLATE = """
 %%{
 %(license)s
 
 #include "config.h"
 #include "%(class_name)s.h"
 #include "core/css/HashTools.h"
 #include <string.h>
 
+#ifdef _MSC_VER
+// Disable the warnings from casting a 64-bit pointer to 32-bit long
+// 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 valueListStringPool[] = {
 %(value_keyword_strings)s
 };
 
 static const unsigned short valueListStringOffsets[] = {
 %(value_keyword_offsets)s
 };
 
 %%}
@@ skipping 105 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(CSSValueKeywordsWriter).main(sys.argv)