Move renderer accessibility to subdir and add OWNERS

content/renderer/accessibility_node_serializer.h

Index: content/renderer/accessibility_node_serializer.h
diff --git a/content/renderer/accessibility_node_serializer.h b/content/renderer/accessibility_node_serializer.h
deleted file mode 100644
index 3caca8be3515389a2a073f4347d9d54a8aa645c4..0000000000000000000000000000000000000000
--- a/content/renderer/accessibility_node_serializer.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) 2012 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.
-
-#ifndef CONTENT_RENDERER_ACCESSIBILITY_NODE_SERIALIZER_H_
-#define CONTENT_RENDERER_ACCESSIBILITY_NODE_SERIALIZER_H_
-
-#include "content/common/accessibility_node_data.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebAccessibilityObject.h"
-
-namespace content {
-
-void SerializeAccessibilityNode(
-    const WebKit::WebAccessibilityObject& src,
-    AccessibilityNodeData* dst,
-    bool include_children);
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_ACCESSIBILITY_NODE_SERIALIZER_H_