Block renderer-initiated main frame navigations to data URLs

content/browser/frame_host/data_url_navigation_throttle.h

+// Copyright 2017 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_FRAME_HOST_DATA_URL_NAVIGATION_THROTTLE_
+#define CONTENT_BROWSER_FRAME_HOST_DATA_URL_NAVIGATION_THROTTLE_
+
+#include <memory>
+
+#include "content/public/browser/navigation_throttle.h"
+
+namespace content {
+
+class DataUrlNavigationThrottle : public NavigationThrottle {
+ public:
+  DataUrlNavigationThrottle(NavigationHandle* navigation_handle);
+  ~DataUrlNavigationThrottle() override;
+
+  // NavigationThrottle method:
+  ThrottleCheckResult WillProcessResponse() override;
+
+  static std::unique_ptr<NavigationThrottle> CreateThrottleForNavigation(
+      NavigationHandle* navigation_handle);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_FRAME_HOST_DATA_URL_NAVIGATION_THROTTLE_