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 338db02e52f226a97585e4ed89fea84e4e8bef1a..f81f2ae8237f2d7c5f0f1f6dd5b77be5efc97ace 100644
--- a/third_party/WebKit/Source/core/frame/UseCounter.h
+++ b/third_party/WebKit/Source/core/frame/UseCounter.h
@@ -971,6 +971,13 @@ public:
         SVG1DOMImageElement = 1115,
         SVG1DOMForeignObjectElement = 1116,
         AudioContextCreateIIRFilter = 1117,
+        GeolocationInsecureOriginIframe = 1118,
+        GeolocationSecureOriginIframe = 1119,
+        RequestMIDIAccessIframe = 1120,
+        GetUserMediaSecureOriginIframe = 1121,
+        ElementRequestPointerLockIframe = 1122,
+        NotificationAPIInsecureOriginIframe = 1123,
+        NotificationAPISecureOriginIframe = 1124,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
@@ -1013,6 +1020,9 @@ public:
     static void countDeprecationIfNotPrivateScript(v8::Isolate*, ExecutionContext*, Feature);
     static String deprecationMessage(Feature);
 
+    // Count only features if they're being used in a cross-origin iframe.
+    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);