CSP: group policies in didAddContentSecurityPolicy.

content/common/content_security_policy_header.cc

+// 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.
+
+#include "content/common/content_security_policy_header.h"
+
+namespace content {
+
+ContentSecurityPolicyHeader::ContentSecurityPolicyHeader()
+    : header_value(std::string()),
+      type(blink::WebContentSecurityPolicyTypeEnforce),
+      source(blink::WebContentSecurityPolicySourceHTTP) {}
+
+ContentSecurityPolicyHeader::ContentSecurityPolicyHeader(
+    const std::string& header_value,
+    blink::WebContentSecurityPolicyType type,
+    blink::WebContentSecurityPolicySource source)
+    : header_value(header_value), type(type), source(source) {}
+
+}  // namespace content