Implement ContentSecurityPolicy on the browser-side.

content/common/content_security_policy/csp_directive.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_COMMON_CONTENT_SECURITY_POLICY_CSP_DIRECTIVE_
+#define CONTENT_COMMON_CONTENT_SECURITY_POLICY_CSP_DIRECTIVE_
+
+#include <string>
+#include "content/common/content_export.h"
+#include "content/common/content_security_policy/csp_source_list.h"
+
+namespace content {
+
+// CSPDirective contains a set of allowed sources for a given Content Security
+// Policy directive.
+//
+// For example, the Content Security Policy `default-src img.cdn.com
+// example.com` would produce a CSPDirective object whose 'name' is
+// 'DefaultSrc', and whose 'source_list' contains two CSPSourceExpressions
+// representing 'img.cdn.com' and 'example.com' respectively.
+//
+// https://w3c.github.io/webappsec-csp/#framework-directives
+struct CONTENT_EXPORT CSPDirective {
+  enum Name {
+    DefaultSrc,
+    ChildSrc,
+    FrameSrc,
+    FormAction,
+
+    Unknown,
+    NameLast = Unknown,
+  };
+
+  static std::string NameToString(Name name);
+  static Name StringToName(const std::string& name);
+
+  CSPDirective();
+  CSPDirective(Name name, const CSPSourceList& source_list);
+  CSPDirective(const CSPDirective&);
+
+  Name name;
+  CSPSourceList source_list;
+
+  std::string ToString() const;
+};
+
+}  // namespace content
+#endif  // CONTENT_COMMON_CONTENT_SECURITY_POLICY_CSP_DIRECTIVE_