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

 // Copyright 2016 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 FeaturePolicy_h
 #define FeaturePolicy_h
 
 #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 <memory>
 
 namespace blink {
 
 // Feature Policy is a mechanism for controlling the availability of web
 // platform features in a frame, including all embedded frames. It can be used
@@ skipping 46 matching lines @@
 // FeaturePolicy::DefaultPolicy for details)
 
 class PLATFORM_EXPORT FeaturePolicy final {
  public:
   // Represents a collection of origins which make up a whitelist in a feature
   // policy. This collection may be set to match every origin (corresponding to
   // the "*" syntax in the policy string, in which case the contains() method
   // will always return true.
   class Whitelist final {
    public:
+    static std::unique_ptr<Whitelist> from(
+        const WebFeaturePolicy::ParsedWhitelist&);
+
     Whitelist();
 
     // Adds a single origin to the whitelist.
     void add(RefPtr<SecurityOrigin>);
 
     // Adds all origins to the whitelist.
     void addAll();
 
     // Returns true if the given origin has been added to the whitelist.
     bool contains(const SecurityOrigin&) const;
@@ skipping 30 matching lines @@
     // The name of the feature, as it should appear in a policy string
     const char* const featureName;
 
     // Controls whether the feature should be available in the platform by
     // default, in the absence of any declared policy.
     FeatureDefault defaultPolicy;
   };
 
   using FeatureList = const Vector<const FeaturePolicy::Feature*>;
 
+  // Converts a JSON feature policy string into a vector of whitelists, one for
+  // each feature specified. Unrecognized features are parsed and included
+  // but will be filtered out when the policy is constructed. If |messages| is
+  // not null, then any errors in the input will cause an error message to be
+  // appended to it.
+  static WebParsedFeaturePolicy parseFeaturePolicy(const String& policy,
+                                                   RefPtr<SecurityOrigin>,
+                                                   Vector<String>* messages);
+
   static std::unique_ptr<FeaturePolicy> createFromParentPolicy(
       const FeaturePolicy* parent,
       RefPtr<SecurityOrigin>);
 
-  // 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);
+  // Sets the declared policy from the parsed Feature-Policy HTTP header.
+  // Unrecognized features will be ignored.
+  void setHeaderPolicy(const WebParsedFeaturePolicy&);
 
   // Returns whether or not the given feature is enabled by this policy.
   bool isFeatureEnabledForOrigin(const Feature&, const SecurityOrigin&) const;
 
   // Returns whether or not the given feature is enabled for the frame that owns
   // the policy.
   bool isFeatureEnabled(const Feature&) const;
 
   // Returns the list of features which can be controlled by Feature Policy.
   static FeatureList& getDefaultFeatureList();
@@ skipping 41 matching lines @@
 extern const PLATFORM_EXPORT FeaturePolicy::Feature kPushFeature;
 extern const PLATFORM_EXPORT FeaturePolicy::Feature kSyncScript;
 extern const PLATFORM_EXPORT FeaturePolicy::Feature kSyncXHR;
 extern const PLATFORM_EXPORT FeaturePolicy::Feature kUsermedia;
 extern const PLATFORM_EXPORT FeaturePolicy::Feature kVibrateFeature;
 extern const PLATFORM_EXPORT FeaturePolicy::Feature kWebRTC;
 
 }  // namespace blink
 
 #endif  // FeaturePolicy_h