Add a UseCounter for notification permission requests from iframes

third_party/WebKit/Source/modules/notifications/Notification.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 348 matching lines @@
 }
 
 ScriptPromise Notification::requestPermission(
     ScriptState* scriptState,
     NotificationPermissionCallback* deprecatedCallback) {
   ExecutionContext* context = scriptState->getExecutionContext();
   if (!context->isSecureContext()) {
     Deprecation::countDeprecation(
         context, UseCounter::NotificationPermissionRequestedInsecureOrigin);
   }
+  if (context->isDocument()) {
+    LocalFrame* frame = toDocument(context)->frame();
+    if (frame && !frame->isMainFrame()) {
+      UseCounter::count(context,
+                        UseCounter::NotificationPermissionRequestedIframe);
+    }
+  }
+
   InspectorInstrumentation::NativeBreakpoint nativeBreakpoint(
       context, "Notification.requestPermission", true, true);
+
   return NotificationManager::from(context)->requestPermission(
       scriptState, deprecatedCallback);
 }
 
 size_t Notification::maxActions() {
   return kWebNotificationMaxActions;
 }
 
 DispatchEventResult Notification::dispatchEventInternal(Event* event) {
   DCHECK(getExecutionContext()->isContextThread());
@@ skipping 26 matching lines @@
 }
 
 DEFINE_TRACE(Notification) {
   visitor->trace(m_prepareShowMethodRunner);
   visitor->trace(m_loader);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink