PlzNavigate & CSP. Use the SourceLocation in violation reports.

third_party/WebKit/public/web/WebSourceLocation.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 WebSourceLocation_h
-#define WebSourceLocation_h
-
-#include "third_party/WebKit/public/platform/WebString.h"
-
-namespace blink {
-
-// PlzNavigate
-// This struct is passed to the browser when navigating, so that console error
-// messages due to the navigation do not lose the source location information.
-struct WebSourceLocation {
-  WebString url;
-  unsigned lineNumber = 0;
-  unsigned columnNumber = 0;
-};
-
-}  // namespace blink
-
-#endif