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

content/child/feature_policy/feature_policy_platform.h

Index: content/child/feature_policy/feature_policy_platform.h
diff --git a/content/child/feature_policy/feature_policy_platform.h b/content/child/feature_policy/feature_policy_platform.h
new file mode 100644
index 0000000000000000000000000000000000000000..dbf1e95710d11694cf2a11ff93c67739efe6b554
--- /dev/null
+++ b/content/child/feature_policy/feature_policy_platform.h
@@ -0,0 +1,22 @@
+// 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_