[mojo] Add pickling support for native-only structs

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

 # Copyright 2013 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.
 
 # This module's classes provide an interface to mojo modules. Modules are
 # collections of interfaces and structs to be used by mojo ipc clients and
 # servers.
 #
 # A simple interface would be created this way:
 # module = mojom.generate.module.Module('Foo')
@@ skipping 585 matching lines @@
   def _IsCloneable(kind, visited_kinds):
     if kind in visited_kinds:
       # No need to examine the kind again.
       return True
     visited_kinds.add(kind)
     if IsAnyHandleKind(kind) or IsInterfaceKind(kind) or IsAssociatedKind(kind):
       return False
     if IsArrayKind(kind):
       return _IsCloneable(kind.kind, visited_kinds)
     if IsStructKind(kind) or IsUnionKind(kind):
+      if IsStructKind(kind) and kind.native_only:
+        return False
       for field in kind.fields:
         if not _IsCloneable(field.kind, visited_kinds):
           return False
     if IsMapKind(kind):
       # No need to examine the key kind, only primitive kinds and non-nullable
       # string are allowed to be key kinds.
       return _IsCloneable(kind.value_kind, visited_kinds)
     return True
 
   return _IsCloneable(kind, set())
@@ skipping 31 matching lines @@
   visited_kinds = set()
   for method in interface.methods:
     for param in method.parameters:
       if _ContainsAssociatedKinds(param.kind, visited_kinds):
         return True
     if method.response_parameters != None:
       for param in method.response_parameters:
         if _ContainsAssociatedKinds(param.kind, visited_kinds):
           return True
   return False