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diff --git a/chromium/content/browser/ukm_internals_ui.h b/chromium/content/browser/ukm_internals_ui.h
new file mode 100644
index 00000000000..77099b816f7
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+++ b/chromium/content/browser/ukm_internals_ui.h
@@ -0,0 +1,24 @@
+// Copyright 2018 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_BROWSER_UKM_INTERNALS_UI_H_
+#define CONTENT_BROWSER_UKM_INTERNALS_UI_H_
+
+#include "base/macros.h"
+#include "content/public/browser/web_ui_controller.h"
+
+namespace content {
+
+// Handles serving the chrome://ukm HTML and JS.
+class UkmInternalsUI : public WebUIController {
+ public:
+  explicit UkmInternalsUI(WebUI* web_ui);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UkmInternalsUI);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_UKM_INTERNALS_UI_H_