Replicate a parsed feature policy representation so it doesn't need to be parsed in the browser pro…

third_party/WebKit/Source/platform/feature_policy/FeaturePolicy.h

Index: third_party/WebKit/Source/platform/feature_policy/FeaturePolicy.h
diff --git a/third_party/WebKit/Source/platform/feature_policy/FeaturePolicy.h b/third_party/WebKit/Source/platform/feature_policy/FeaturePolicy.h
index b73ee051f93638fc155300776afc08d881ab8afe..0f9b26dce99358a259d8ed553b94d0745adb0998 100644
--- a/third_party/WebKit/Source/platform/feature_policy/FeaturePolicy.h
+++ b/third_party/WebKit/Source/platform/feature_policy/FeaturePolicy.h
@@ -7,9 +7,10 @@
 
 #include "platform/PlatformExport.h"
 #include "platform/weborigin/SecurityOrigin.h"
+#include "public/platform/WebFeaturePolicy.h"
 #include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
+#include "wtf/Vector.h"
 
 #include <memory>
 
@@ -123,6 +124,15 @@ class PLATFORM_EXPORT FeaturePolicy final {
 
   using FeatureList = const Vector<const FeaturePolicy::Feature*>;
 
+  // Converts a list of JSON feature policy items into a mapping of features to
+  // whitelists. For future compatibility, unrecognized features are simply
+  // ignored, as are unparseable origins. If |messages| is not null, then any
+  // errors in the input will cause an error message to be appended to it.
+  static WebVector<WebFeaturePolicy::ParsedWhitelist> parseFeaturePolicy(
+      const String& policy,
+      const SecurityOrigin* origin,
+      Vector<String>* messages);
+
   static std::unique_ptr<FeaturePolicy> createFromParentPolicy(
       const FeaturePolicy* parent,
       RefPtr<SecurityOrigin>);
@@ -130,7 +140,7 @@ class PLATFORM_EXPORT FeaturePolicy final {
   // Sets the declared policy from the Feature-Policy HTTP header. If the header
   // cannot be parsed, errors will be appended to the |messages| vector, if not
   // null.
-  void setHeaderPolicy(const String&, Vector<String>* messages);
+  void setHeaderPolicy(const WebVector<WebFeaturePolicy::ParsedWhitelist>&);
 
   // Returns whether or not the given feature is enabled by this policy.
   bool isFeatureEnabledForOrigin(const Feature&, const SecurityOrigin&) const;