Add "platforms" key in IDL schema compiler.

tools/json_schema_compiler/idl_schema.py

 #! /usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import itertools
 import json
 import os.path
 import re
 import sys
@@ skipping 295 matching lines @@
         result[property_name] = True
     return result
 
 
 class Namespace(object):
   '''
   Given an IDLNode representing an IDL namespace, converts into a Python
   dictionary that the JSON schema compiler expects to see.
   '''
 
-  def __init__(self, namespace_node, description, nodoc=False, internal=False):
+  def __init__(self,
+               namespace_node,
+               description,
+               nodoc=False,
+               internal=False,
+               platforms=None):
     self.namespace = namespace_node
     self.nodoc = nodoc
     self.internal = internal
+    self.platforms = platforms
     self.events = []
     self.functions = []
     self.types = []
     self.callbacks = OrderedDict()
     self.description = description
 
   def process(self):
     for node in self.namespace.children:
       if node.cls == 'Dictionary':
         self.types.append(Dictionary(node).process(self.callbacks))
       elif node.cls == 'Callback':
         k, v = Member(node).process(self.callbacks)
         self.callbacks[k] = v
       elif node.cls == 'Interface' and node.GetName() == 'Functions':
         self.functions = self.process_interface(node)
       elif node.cls == 'Interface' and node.GetName() == 'Events':
         self.events = self.process_interface(node)
       elif node.cls == 'Enum':
         self.types.append(Enum(node).process(self.callbacks))
       else:
         sys.exit('Did not process %s %s' % (node.cls, node))
     return {'namespace': self.namespace.GetName(),
             'description': self.description,
             'nodoc': self.nodoc,
             'types': self.types,
             'functions': self.functions,
             'internal': self.internal,
-            'events': self.events}
+            'events': self.events,
+            'platforms': self.platforms}
 
   def process_interface(self, node):
     members = []
     for member in node.children:
       if member.cls == 'Member':
         name, properties = Member(member).process(self.callbacks)
         members.append(properties)
     return members
 
 
 class IDLSchema(object):
   '''
   Given a list of IDLNodes and IDLAttributes, converts into a Python list
   of api_defs that the JSON schema compiler expects to see.
   '''
 
   def __init__(self, idl):
     self.idl = idl
 
   def process(self):
     namespaces = []
     nodoc = False
     internal = False
     description = None
+    platforms = None
     for node in self.idl:
       if node.cls == 'Namespace':
         if not description:
           # TODO(kalman): Go back to throwing an error here.
           print('%s must have a namespace-level comment. This will '
                            'appear on the API summary page.' % node.GetName())
           description = ''
-        namespace = Namespace(node, description, nodoc, internal)
+        namespace = Namespace(node, description, nodoc, internal, platforms)
         namespaces.append(namespace.process())
         nodoc = False
         internal = False
+        platforms = None
       elif node.cls == 'Copyright':
         continue
       elif node.cls == 'Comment':
         description = node.GetName()
       elif node.cls == 'ExtAttribute':
         if node.name == 'nodoc':
           nodoc = bool(node.value)
         elif node.name == 'internal':
           internal = bool(node.value)
+        elif node.name == 'platforms':
+          platforms = list(node.value)
         else:
           continue
       else:
         sys.exit('Did not process %s %s' % (node.cls, node))
     return namespaces
 
 
 def Load(filename):
   '''
   Given the filename of an IDL file, parses it and returns an equivalent
@@ skipping 14 matching lines @@
   Dump a json serialization of parse result for the IDL files whose names
   were passed in on the command line.
   '''
   for filename in sys.argv[1:]:
     schema = Load(filename)
     print json.dumps(schema, indent=2)
 
 
 if __name__ == '__main__':
   Main()