mojom: Add associative arrays to the mojom language.

mojo/public/tools/bindings/pylib/mojom/generate/module.py

Index: mojo/public/tools/bindings/pylib/mojom/generate/module.py
diff --git a/mojo/public/tools/bindings/pylib/mojom/generate/module.py b/mojo/public/tools/bindings/pylib/mojom/generate/module.py
index 238f060fb6ac4eba91a4670c548ab0aaefefa1db..ad6950a967045db60d7acd82d19b62a84f63218d 100644
--- a/mojo/public/tools/bindings/pylib/mojom/generate/module.py
+++ b/mojo/public/tools/bindings/pylib/mojom/generate/module.py
@@ -228,6 +228,17 @@ class FixedArray(ReferenceKind):
     self.length = length
 
 
+class Map(ReferenceKind):
+  ReferenceKind.AddSharedProperty('key_kind')
+  ReferenceKind.AddSharedProperty('value_kind')
+
+  def __init__(self, key_kind, value_kind):
+    ReferenceKind.__init__(self,
+                           'm[' + key_kind.spec + '][' + value_kind.spec + ']')
+    self.key_kind = key_kind
+    self.value_kind = value_kind
+
+
 class InterfaceRequest(ReferenceKind):
   ReferenceKind.AddSharedProperty('kind')
 
@@ -399,9 +410,13 @@ def IsAnyArrayKind(kind):
   return IsArrayKind(kind) or IsFixedArrayKind(kind)
 
 
-def IsObjectKind(kind):
-  return IsStructKind(kind) or IsAnyArrayKind(kind) or IsStringKind(kind)
+def IsMapKind(kind):
+  return isinstance(kind, Map)
+
 
+def IsObjectKind(kind):
+  return (IsStructKind(kind) or IsAnyArrayKind(kind) or IsStringKind(kind) or
+          IsMapKind(kind))
 
 def IsNonInterfaceHandleKind(kind):
   return (IsHandleKind(kind) or