Add a chrome://interstitials page.

chrome/browser/ui/webui/interstitials/interstitial_ui.h

+// Copyright 2014 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 CHROME_BROWSER_UI_WEBUI_INTERSTITIALS_INTERSTITIAL_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_INTERSTITIALS_INTERSTITIAL_UI_H_
+
+#include <string>
+
+#include "content/public/browser/url_data_source.h"
+#include "content/public/browser/web_ui_controller.h"
+
+class Profile;
+
+namespace content {
+class WebContents;
+}
+
+class InterstitialUI : public content::WebUIController {
+ public:
+  explicit InterstitialUI(content::WebUI* web_ui);
+
+  virtual InterstitialUI();
+
+ private:
+  class InterstitialHTMLSource : public content::URLDataSource {
+  public:
+    InterstitialHTMLSource(Profile* profile,
+                           content::WebContents* web_contents);
+    virtual ~InterstitialHTMLSource();
+
+    // content::URLDataSource:
+    virtual std::string GetMimeType(
+        const std::string& mime_type) const OVERRIDE;
+    virtual std::string GetSource() const OVERRIDE;
+    virtual bool ShouldAddContentSecurityPolicy() const OVERRIDE;
+    virtual void StartDataRequest(
+        const std::string& path,
+        int render_process_id,
+        int render_frame_id,
+        const content::URLDataSource::GotDataCallback& callback) OVERRIDE;
+
+   private:
+     Profile* profile_;
+     content::WebContents* web_contents_;
+    DISALLOW_COPY_AND_ASSIGN(InterstitialHTMLSource);
+  };
+
+  DISALLOW_COPY_AND_ASSIGN(InterstitialUI);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_INTERSTITIALS_INTERSTITIAL_UI_H_