Move content-side Feature Policy code into content/{common,child}/feature_policy

content/child/feature_policy/feature_policy_platform.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_CHILD_FEATURE_POLICY_FEATURE_POLICY_PLATFORM_H_
+#define CONTENT_CHILD_FEATURE_POLICY_FEATURE_POLICY_PLATFORM_H_
+
+#include "content/common/feature_policy/feature_policy.h"
+#include "third_party/WebKit/public/platform/WebFeaturePolicy.h"
+
+namespace content {
+
+// Conversions between ParsedFeaturePolicyHeader and
+// WebParsedFeaturePolicyHeader
+ParsedFeaturePolicyHeader FeaturePolicyHeaderFromWeb(
+    const blink::WebParsedFeaturePolicyHeader& web_feature_policy_header);
+blink::WebParsedFeaturePolicyHeader FeaturePolicyHeaderToWeb(
+    const ParsedFeaturePolicyHeader& feature_policy_header);
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_FEATURE_POLICY_FEATURE_POLICY_PLATFORM_H_