refactor: remove references to non-existent webui (#20867)

shell/renderer/pepper_helper.h

@@ -0,0 +1,28 @@
+// 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 SHELL_RENDERER_PEPPER_HELPER_H_
+#define SHELL_RENDERER_PEPPER_HELPER_H_
+
+#include "base/compiler_specific.h"
+#include "base/component_export.h"
+#include "base/macros.h"
+#include "content/public/renderer/render_frame_observer.h"
+
+// This class listens for Pepper creation events from the RenderFrame and
+// attaches the parts required for plugin support.
+class PepperHelper : public content::RenderFrameObserver {
+ public:
+  explicit PepperHelper(content::RenderFrame* render_frame);
+  ~PepperHelper() override;
+
+  // RenderFrameObserver.
+  void DidCreatePepperPlugin(content::RendererPpapiHost* host) override;
+  void OnDestruct() override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PepperHelper);
+};
+
+#endif  // SHELL_RENDERER_PEPPER_HELPER_H_