Feature policy: Add basic algorithm for supporting frame policies.

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"
@@ skipping 120 matching lines @@
   // 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,
+      const WebParsedFeaturePolicy* framePolicy,
       RefPtr<SecurityOrigin>);
 
   // 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();
 
   String toString();
 
  private:
   friend class FeaturePolicyTest;
   friend class FeaturePolicyInFrameTest;
 
   FeaturePolicy(RefPtr<SecurityOrigin>, FeatureList& features);
 
   static std::unique_ptr<FeaturePolicy> createFromParentPolicy(
       const FeaturePolicy* parent,
+      const WebParsedFeaturePolicy* framePolicy,
       RefPtr<SecurityOrigin>,
       FeatureList& features);
 
+  void addFramePolicy(const FeaturePolicy* parent,
+                      const WebParsedFeaturePolicy* framePolicy);
+
   RefPtr<SecurityOrigin> m_origin;
 
   // Records whether or not each feature was enabled for this frame by its
   // parent frame.
   // TODO(iclelland): Generate, instead of this map, a set of bool flags, one
   // for each feature, as all features are supposed to be represented here.
   HashMap<const Feature*, bool> m_inheritedFeatures;
 
   // Map of feature names to declared whitelists. Any feature which is missing
   // from this map should use the inherited policy.
@@ skipping 18 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