PlzNavigate: Enforce 'form-action' CSP on the browser-side.

content/browser/frame_host/form_submission_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_FORM_SUBMISSION_THROTTLE_H_
+#define CONTENT_BROWSER_FRAME_HOST_FORM_SUBMISSION_THROTTLE_H_
+
+#include <memory>
+#include <string>
+
+#include "base/macros.h"
+#include "content/public/browser/navigation_throttle.h"
+
+namespace content {
+class NavigationHandle;
+
+// A FormSubmissionThrottle is responsible for enforcing the 'form-action' CSP,

[nasko, 2017/03/16 21:49:47]

nit: CSP directives.

[arthursonzogni, 2017/03/17 14:58:24]

Done.

+// blocking requests which violate them.
+// It is enforcing it only if PlzNavigate is enabled. Blink is still enforcing
+// the 'form-action' directive on the renderer side.

[nasko, 2017/03/16 21:49:46]

nit: renderer process

[arthursonzogni, 2017/03/17 14:58:24]

Done.

+class CONTENT_EXPORT FormSubmissionThrottle : public NavigationThrottle {
+ public:
+  static std::unique_ptr<NavigationThrottle> MaybeCreateThrottleFor(
+      NavigationHandle* handle);
+
+  ~FormSubmissionThrottle() override;
+
+  NavigationThrottle::ThrottleCheckResult WillStartRequest() override;
+  NavigationThrottle::ThrottleCheckResult WillRedirectRequest() override;
+
+ private:
+  explicit FormSubmissionThrottle(NavigationHandle* handle);
+  NavigationThrottle::ThrottleCheckResult CheckContentSecurityPolicyFormAction(
+      bool is_redirect);
+
+  DISALLOW_COPY_AND_ASSIGN(FormSubmissionThrottle);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_FRAME_HOST_FORM_SUBMISSION_THROTTLE_H_