[Autofill] Add typemap for autofill:FormFieldData and autofill::FormData.

components/autofill/content/public/interfaces/autofill_types.mojom

Index: components/autofill/content/public/interfaces/autofill_types.mojom
diff --git a/components/autofill/content/public/interfaces/autofill_types.mojom b/components/autofill/content/public/interfaces/autofill_types.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..37a1e22105f6c82aabc00a6020cf82a5b8910b1a
--- /dev/null
+++ b/components/autofill/content/public/interfaces/autofill_types.mojom
@@ -0,0 +1,51 @@
+// Copyright 2016 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.
+
+module autofill.mojom;
+
+import "url/mojo/url.mojom";
+
+// autofill::FormFieldData::RoleAttribute
+enum RoleAttribute {
+  ROLE_ATTRIBUTE_PRESENTATION,
+  ROLE_ATTRIBUTE_OTHER
+};
+
+// base::i18n::TextDirection
+enum TextDirection {
+  UNKNOWN_DIRECTION = 0,
+  RIGHT_TO_LEFT = 1,
+  LEFT_TO_RIGHT = 2,
+  TEXT_DIRECTION_NUM_DIRECTIONS = 3
+};
+
+struct FormFieldData {
+  string label;
+  string name;
+  string value;
+  string form_control_type;
+  string autocomplete_attribute;
+  string placeholder;
+
+  uint64 max_length;
+  bool is_autofilled;
+  bool is_checked;
+  bool is_checkable;
+  bool is_focusable;
+  bool should_autocomplete;
+  RoleAttribute role;
+  TextDirection text_direction;
+
+  array<string> option_values;
+  array<string> option_contents;
+};
+
+struct FormData {
+  string name;
+  url.mojom.Url origin;
+  url.mojom.Url action;
+  bool is_form_tag;
+  bool is_formless_checkout;
+  array<FormFieldData> fields;
+};