Don't auto allow access to media devices unless a the security origin of the requester is the same …

chrome/browser/media/media_stream_devices_controller.cc

Index: chrome/browser/media/media_stream_devices_controller.cc
diff --git a/chrome/browser/media/media_stream_devices_controller.cc b/chrome/browser/media/media_stream_devices_controller.cc
index 98a08f3f248a010514f6b774fc90f594e64a5365..dc0d0e8bbe436cf42364330c36b6636e2e8513b0 100644
--- a/chrome/browser/media/media_stream_devices_controller.cc
+++ b/chrome/browser/media/media_stream_devices_controller.cc
@@ -498,6 +498,11 @@ void MediaStreamDevicesController::RequestFinished() {
 }
 
 bool MediaStreamDevicesController::IsRequestAllowedByDefault() const {
+  // If not all ancestors of the requesting frame have the same origin, do not
+  // allow the request per default.
+  if (!request_.all_ancestors_have_same_origin)
+    return false;
+
   // The request from internal objects like chrome://URLs is always allowed.
   if (CheckAllowAllMediaStreamContentForOrigin(profile_,
                                                request_.security_origin)) {