Add metrics for usage of permission features from iframes in blink

third_party/WebKit/Source/core/frame/UseCounter.h

Index: third_party/WebKit/Source/core/frame/UseCounter.h
diff --git a/third_party/WebKit/Source/core/frame/UseCounter.h b/third_party/WebKit/Source/core/frame/UseCounter.h
index fb179a8399889bccd401aac0de5be7ee6df22858..3d0aa46637d9a79ada9cf7f40059fc3fa3355ae4 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -994,6 +994,14 @@ public:
         V8PromiseAccept = 1138,
         V8PromiseDefer = 1139,
         EventScoped = 1140,
+        GeolocationInsecureOriginIframe = 1141,
+        GeolocationSecureOriginIframe = 1142,
+        RequestMIDIAccessIframe = 1143,
+        GetUserMediaInsecureOriginIframe = 1144,
+        GetUserMediaSecureOriginIframe = 1145,
+        ElementRequestPointerLockIframe = 1146,
+        NotificationAPIInsecureOriginIframe = 1147,
+        NotificationAPISecureOriginIframe = 1148,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
@@ -1036,6 +1044,10 @@ public:
     static void countDeprecationIfNotPrivateScript(v8::Isolate*, ExecutionContext*, Feature);
     static String deprecationMessage(Feature);
 
+    // Count only features if they're being used in an iframe which does not
+    // have script access into the top level document.
+    static void countCrossOriginIframe(const Document&, Feature);
+
     // Return whether the Feature was previously counted for this document.
     // NOTE: only for use in testing.
     static bool isCounted(Document&, Feature);