Dynamically generate a heading for Extension Docs API pages

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 4c79c30efaa159b17bc41951407e6ee624f83c9c..6ab193eb056c9f128318f90d4ef1b0c5e03107bd 100644
--- a/tools/json_schema_compiler/idl_schema.py
+++ b/tools/json_schema_compiler/idl_schema.py
@@ -308,7 +308,7 @@ class Namespace(object):
   '''
 
   def __init__(self, namespace_node, nodoc=False, permissions=None,
-               internal=False):
+               internal=False, description=None):
     self.namespace = namespace_node
     self.nodoc = nodoc
     self.internal = internal
@@ -317,6 +317,7 @@ class Namespace(object):
     self.types = []
     self.callbacks = OrderedDict()
     self.permissions = permissions or []
+    self.description = description
 
   def process(self):
     for node in self.namespace.children:
@@ -334,6 +335,7 @@ class Namespace(object):
       else:
         sys.exit('Did not process %s %s' % (node.cls, node))
     return {'namespace': self.namespace.GetName(),
+            'description': self.description,
             'nodoc': self.nodoc,
             'documentation_permissions_required': self.permissions,
             'types': self.types,
@@ -363,16 +365,19 @@ class IDLSchema(object):
     nodoc = False
     internal = False
     permissions = None
+    description = None
     for node in self.idl:
       if node.cls == 'Namespace':
-        namespace = Namespace(node, nodoc, permissions, internal)
+        namespace = Namespace(node, nodoc, permissions, internal, description)
         namespaces.append(namespace.process())
         nodoc = False
         internal = False
       elif node.cls == 'Copyright':
         continue
       elif node.cls == 'Comment':
-        continue
+        description = node.GetName()
+        if description == '':
+          description = None
       elif node.cls == 'ExtAttribute':
         if node.name == 'nodoc':
           nodoc = bool(node.value)