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diff --git a/content/public/renderer/render_view_visitor.h b/content/public/renderer/render_view_visitor.h
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+++ b/content/public/renderer/render_view_visitor.h
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+// Copyright (c) 2009 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_PUBLIC_RENDERER_RENDER_VIEW_VISITOR_H_
+#define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_VISITOR_H_
+#pragma once
+
+class RenderView;
+
+namespace content {
+
+class RenderViewVisitor {
+ public:
+  // Return true to continue visiting RenderViews or false to stop.
+  virtual bool Visit(RenderView* render_view) = 0;
+
+ protected:
+  virtual ~RenderViewVisitor() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_VISITOR_H_