Add extended attribute, [Measure], to simplify use counting

Source/bindings/scripts/v8_utilities.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 349 matching lines @@
 
 
 def cpp_name_or_partial(interface):
     cpp_class_name = cpp_name(interface)
     if interface.is_partial:
         return ''.join([cpp_class_name, 'Partial'])
     return cpp_class_name
 
 
 # [MeasureAs]
-def measure_as(definition_or_member):
+def measure_as(definition_or_member, interface=None):

[haraken, 2015/01/28 13:02:22]

Can we force the interface parameter? I'm wondering when we want to make it
None.

     extended_attributes = definition_or_member.extended_attributes
-    if 'MeasureAs' not in extended_attributes:
+    if 'DoNotMeasure' in extended_attributes:
         return None
-    includes.add('core/frame/UseCounter.h')
-    return extended_attributes['MeasureAs']
+    if 'MeasureAs' in extended_attributes:
+        includes.add('core/frame/UseCounter.h')
+        return lambda suffix: extended_attributes['MeasureAs']
+    if 'Measure' in extended_attributes or (interface is not None and 'Measure' in interface.extended_attributes):
+        includes.add('core/frame/UseCounter.h')
+        measure_as_name = capitalize(definition_or_member.name)
+        if interface is not None:
+            measure_as_name = '%s_%s' % (capitalize(interface.name), measure_as_name)

[Jens Widell, 2015/01/28 12:48:31]

Nit: I don't know if it makes much sense to use capitalize() on interface names;
they're typically capitalized already.

+        return lambda suffix: 'V8%s_%s' % (measure_as_name, suffix)
+    return None
 
 
 # [PerContextEnabled]
 def per_context_enabled_function_name(definition_or_member):
     extended_attributes = definition_or_member.extended_attributes
     if 'PerContextEnabled' not in extended_attributes:
         return None
     feature_name = extended_attributes['PerContextEnabled']
     return 'ContextFeatures::%sEnabled' % uncapitalize(feature_name)
 
 
 # [RuntimeEnabled]
 def runtime_enabled_function_name(definition_or_member):
     """Returns the name of the RuntimeEnabledFeatures function.
 
     The returned function checks if a method/attribute is enabled.
     Given extended attribute RuntimeEnabled=FeatureName, return:
         RuntimeEnabledFeatures::{featureName}Enabled
     """
     extended_attributes = definition_or_member.extended_attributes
     if 'RuntimeEnabled' not in extended_attributes:
         return None
     feature_name = extended_attributes['RuntimeEnabled']
     return 'RuntimeEnabledFeatures::%sEnabled' % uncapitalize(feature_name)