Introduce content-side Feature Policy object and maintain in parallel with renderer policy.

third_party/WebKit/public/platform/WebFeaturePolicy.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 WebFeaturePolicy_h
 #define WebFeaturePolicy_h
 
 #include "WebSecurityOrigin.h"
 #include "WebString.h"
 #include "WebVector.h"
 
 namespace blink {
 
+enum class WebFeaturePolicyFeature {

[Rick Byers, 2017/02/09 20:40:14]

nit: we generally try to write detailed comments for (new) public APIs.  Could
you add a comment saying where to look for the precise definition of each of
these (eg. should these map 1:1 to the spec, and/or is there some other
definition inside blink that should be considered authoritative)?  Or perhaps
add detailed comments here as the canonical definition of what exactly each of
these features refers to?

[iclelland, 2017/02/09 21:01:00]

Done, thanks!

+  NotFound = 0,
+  DocumentCookie,
+  DocumentDomain,
+  DocumentWrite,
+  Geolocation,
+  Fullscreen,
+  MidiFeature,
+  Notifications,
+  Payment,
+  Push,
+  SyncScript,
+  SyncXHR,
+  Usermedia,
+  Vibrate,
+  WebRTC,
+  LAST_FEATURE = WebRTC
+};
+
 struct WebParsedFeaturePolicyDeclaration {
   WebParsedFeaturePolicyDeclaration() : matchesAllOrigins(false) {}
   WebString featureName;
   bool matchesAllOrigins;
   WebVector<WebSecurityOrigin> origins;
 };
 
 // Used in Blink code to represent parsed headers. Used for IPC between renderer
 // and browser.
 using WebParsedFeaturePolicyHeader =
     WebVector<WebParsedFeaturePolicyDeclaration>;
 
 }  // namespace blink
 
 #endif  // WebFeaturePolicy_h