Implement ContentSecurityPolicy on the browser-side.

content/common/content_security_policy/csp_source.h

Index: content/common/content_security_policy/csp_source.h
diff --git a/content/common/content_security_policy/csp_source.h b/content/common/content_security_policy/csp_source.h
new file mode 100644
index 0000000000000000000000000000000000000000..203133183b609726a5528685d2455c21081cdeaa
--- /dev/null
+++ b/content/common/content_security_policy/csp_source.h
@@ -0,0 +1,64 @@
+// 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_COMMON_CONTENT_SECURITY_POLICY_CSP_SOURCE_H
+#define CONTENT_BROWSER_COMMON_CONTENT_SECURITY_POLICY_CSP_SOURCE_H
+
+#include <string>
+
+#include "base/optional.h"
+#include "content/common/content_export.h"
+#include "url/gurl.h"
+
+namespace content {
+
+class CSPContext;
+
+struct CONTENT_EXPORT CSPSource {
+  CSPSource();
+  CSPSource(const std::string& scheme,
+            const std::string& host,
+            bool is_host_wildcard,
+            int port,
+            int is_port_wildcard,
+            const std::string& path);
+  CSPSource(const CSPSource& source);
+  ~CSPSource();
+
+  // Scheme.
+  std::string scheme;
+
+  // Host.
+  std::string host;
+  bool is_host_wildcard;
+
+  // port.
+  int port;
+  bool is_port_wildcard;
+
+  // Path.
+  std::string path;
+
+  static base::Optional<CSPSource> Parse(const std::string& text);
+
+  bool Allow(CSPContext* context,
+             const GURL& url,
+             bool is_redirect = false) const;
+
+  std::string ToString() const;
+
+ private:
+  bool IsSchemeOnly() const;
+  bool has_port() const;
+  bool has_host() const;
+  bool has_path() const;
+
+  bool AllowScheme(const GURL& url, CSPContext* context) const;
+  bool AllowHost(const GURL& url) const;
+  bool AllowPort(const GURL& url) const;
+  bool AllowPath(const GURL& url, bool is_redirect) const;
+};
+
+}  // namespace content
+#endif  // CONTENT_BROWSER_COMMON_CONTENT_SECURITY_POLICY_CSP_SOURCE_H