Implement ContentSecurityPolicy on the browser-side.

content/common/content_security_policy/csp_directive.h

Index: content/common/content_security_policy/csp_directive.h
diff --git a/content/common/content_security_policy/csp_directive.h b/content/common/content_security_policy/csp_directive.h
new file mode 100644
index 0000000000000000000000000000000000000000..f09611933c5e25ee2c6e6f893e8c53e81f511d84
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+++ b/content/common/content_security_policy/csp_directive.h
@@ -0,0 +1,43 @@
+// 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 {
+
+// A CSPDirective is a set of allowed sources for a given usage.

[Mike West, 2017/02/15 16:18:18]

How about something like:

"""
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
"""

[arthursonzogni, 2017/02/16 13:30:25]

I really like, thanks!

+// Examples of CSPDirective:
+// - "default-src img.cdn.com example.com"
+// - "frame-src 'self'"
+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_