Block renderer-initiated main frame navigations to data URLs

content/browser/frame_host/data_url_navigation_throttle.h

Index: content/browser/frame_host/data_url_navigation_throttle.h
diff --git a/content/browser/frame_host/data_url_navigation_throttle.h b/content/browser/frame_host/data_url_navigation_throttle.h
new file mode 100644
index 0000000000000000000000000000000000000000..2234ee619c29193319c07d2a241599d05e95c723
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+++ b/content/browser/frame_host/data_url_navigation_throttle.h
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+// 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 "base/macros.h"
+#include "content/public/browser/navigation_throttle.h"
+
+namespace content {
+
+class DataUrlNavigationThrottle : public NavigationThrottle {
+ public:
+  explicit DataUrlNavigationThrottle(NavigationHandle* navigation_handle);
+  ~DataUrlNavigationThrottle() override;
+
+  // NavigationThrottle method:
+  ThrottleCheckResult WillProcessResponse() override;
+
+  static std::unique_ptr<NavigationThrottle> CreateThrottleForNavigation(
+      NavigationHandle* navigation_handle);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DataUrlNavigationThrottle);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_FRAME_HOST_DATA_URL_NAVIGATION_THROTTLE_