[Extensions] Remove linked_ptr entirely from extensions generated code

tools/json_schema_compiler/cpp_type_generator.py

Index: tools/json_schema_compiler/cpp_type_generator.py
diff --git a/tools/json_schema_compiler/cpp_type_generator.py b/tools/json_schema_compiler/cpp_type_generator.py
index 82113ce94a56e5bc780e69f8b8bf761396fafe66..23460c63699c6a6a8845a2978794d5103585c475 100644
--- a/tools/json_schema_compiler/cpp_type_generator.py
+++ b/tools/json_schema_compiler/cpp_type_generator.py
@@ -122,11 +122,9 @@ class CppTypeGenerator(object):
     if not self.FollowRef(type_).property_type == PropertyType.ENUM:
       is_base_value = (cpp_type == 'base::Value' or
                        cpp_type == 'base::DictionaryValue')
-      # Only wrap the object in a linked_ptr if it's a base::Value.
-      # TODO(devlin): Change this to scoped_ptr.
-      if is_in_container and is_base_value:
-        cpp_type = 'linked_ptr<%s>' % cpp_util.PadForGenerics(cpp_type)
-      elif is_ptr:
+      # Wrap ptrs and base::Values in containers (which aren't movable) in
+      # scoped_ptrs.
+      if is_ptr or (is_in_container and is_base_value):
         cpp_type = 'scoped_ptr<%s>' % cpp_util.PadForGenerics(cpp_type)
 
     return cpp_type
@@ -234,12 +232,9 @@ class CppTypeGenerator(object):
     if type_.property_type == PropertyType.REF:
       deps.add(_TypeDependency(self._FindType(type_.ref_type), hard=hard))
     elif type_.property_type == PropertyType.ARRAY:
-      # Non-copyable types are not hard because they are wrapped in linked_ptrs
-      # when generated. Otherwise they're typedefs, so they're hard (though we
-      # could generate those typedefs in every dependent namespace, but that
-      # seems weird).
-      deps = self._TypeDependencies(type_.item_type,
-                                    hard=self.IsCopyable(type_.item_type))
+      # Types in containers are hard dependencies because they are stored
+      # directly and use move semantics.
+      deps = self._TypeDependencies(type_.item_type, hard=hard)
     elif type_.property_type == PropertyType.CHOICES:
       for type_ in type_.choices:
         deps |= self._TypeDependencies(type_, hard=self.IsCopyable(type_))