Move CSSPropertyID templates instantiations to a separate file.

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
 
 
 HEADER_TEMPLATE = """
 %(license)s
 
 #ifndef %(class_name)s_h
 #define %(class_name)s_h
 
 #include "core/CoreExport.h"
-#include "core/css/parser/CSSParserMode.h"
-#include "wtf/HashFunctions.h"
-#include "wtf/HashTraits.h"
-#include <string.h>
+#include "wtf/Assertions.h"
+#include <stddef.h>
 
 namespace WTF {
 class AtomicString;
 class String;
 }
 
 namespace blink {
 
 enum CSSPropertyID {
     CSSPropertyInvalid = 0,
@@ skipping 26 matching lines @@
 }
 
 inline bool isPropertyAlias(CSSPropertyID id) { return id & 512; }
 
 CSSPropertyID unresolvedCSSPropertyID(const WTF::String&);
 
 CSSPropertyID CORE_EXPORT cssPropertyID(const WTF::String&);
 
 } // namespace blink
 
-namespace WTF {
-template<> struct DefaultHash<blink::CSSPropertyID> { typedef IntHash<unsigned> Hash; };
-template<> struct HashTraits<blink::CSSPropertyID> : GenericHashTraits<blink::CSSPropertyID> {
-    static const bool emptyValueIsZero = true;
-    static void constructDeletedValue(blink::CSSPropertyID& slot, bool) { slot = static_cast<blink::CSSPropertyID>(blink::lastUnresolvedCSSProperty + 1); }
-    static bool isDeletedValue(blink::CSSPropertyID value) { return value == (blink::lastUnresolvedCSSProperty + 1); }
-};
-}
-
 #endif // %(class_name)s_h
 """
 
 GPERF_TEMPLATE = """
 %%{
 %(license)s
 
 #include "%(class_name)s.h"
 #include "core/css/HashTools.h"
 #include <string.h>
@@ skipping 143 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)