Add "implemented_in" key in IDL schema compiler

tools/json_schema_compiler/idl_schema.py

Index: tools/json_schema_compiler/idl_schema.py
diff --git a/tools/json_schema_compiler/idl_schema.py b/tools/json_schema_compiler/idl_schema.py
index 238fb05e3ce5b388a8c776bd4942f5984801269a..8317d0b481e8223c459df8125de30f0c65ce24df 100644
--- a/tools/json_schema_compiler/idl_schema.py
+++ b/tools/json_schema_compiler/idl_schema.py
@@ -324,11 +324,13 @@ class Namespace(object):
                description,
                nodoc=False,
                internal=False,
-               platforms=None):
+               platforms=None,
+               compiler_options={}):

[not at google - send to devlin, 2013/11/02 00:01:52]

don't put objects as default values. they're shared amongst all instances of
Namespace. just do = None.

[Haojian Wu, 2013/11/02 01:27:33]

Done.

     self.namespace = namespace_node
     self.nodoc = nodoc
     self.internal = internal
     self.platforms = platforms
+    self.compiler_options = compiler_options
     self.events = []
     self.functions = []
     self.types = []
@@ -357,7 +359,8 @@ class Namespace(object):
             'functions': self.functions,
             'internal': self.internal,
             'events': self.events,
-            'platforms': self.platforms}
+            'platforms': self.platforms,
+            'compiler_options': self.compiler_options}
 
   def process_interface(self, node):
     members = []
@@ -383,6 +386,7 @@ class IDLSchema(object):
     internal = False
     description = None
     platforms = None
+    compiler_options = {}

[not at google - send to devlin, 2013/11/02 00:01:52]

=None?

[Haojian Wu, 2013/11/02 01:27:33]

Done.

     for node in self.idl:
       if node.cls == 'Namespace':
         if not description:
@@ -390,7 +394,8 @@ class IDLSchema(object):
           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, platforms)
+        namespace = Namespace(node, description, nodoc, internal, platforms,
+            compiler_options)

[not at google - send to devlin, 2013/11/02 00:01:52]

name optional arguments. platforms=platforms, compiler_options=compiler_options

[Haojian Wu, 2013/11/02 01:27:33]

Done.

         namespaces.append(namespace.process())
         nodoc = False
         internal = False
@@ -406,6 +411,8 @@ class IDLSchema(object):
           internal = bool(node.value)
         elif node.name == 'platforms':
           platforms = list(node.value)
+        elif node.name == 'implemented_in':
+          compiler_options = dict(implemented_in=node.value)

[not at google - send to devlin, 2013/11/02 00:01:52]

personally I would prefer {'implemented_in': node.value} rather than this
syntax.

[Haojian Wu, 2013/11/02 01:27:33]

Done.

         else:
           continue
       else: