Use security origin for media access permission requests

Fix brave/browser-laptop#5378

Auditors: @bridiver

atom/browser/web_contents_permission_helper.cc

@@ -54,11 +54,16 @@ WebContentsPermissionHelper::~WebContentsPermissionHelper() {
 void WebContentsPermissionHelper::RequestPermission(
     content::PermissionType permission,
     const base::Callback<void(bool)>& callback,
-    bool user_gesture) {
+    bool user_gesture, const GURL& security_origin) {
   auto rfh = web_contents_->GetMainFrame();
   auto permission_manager = static_cast<AtomPermissionManager*>(
       web_contents_->GetBrowserContext()->GetPermissionManager());
-  auto origin = web_contents_->GetLastCommittedURL();
+  GURL origin;
+  if (security_origin.is_empty()) {
+    origin = web_contents_->GetLastCommittedURL();
+  } else {
+    origin = security_origin;
+  }
   permission_manager->RequestPermission(
       permission, rfh, origin,
       base::Bind(&OnPermissionResponse, callback));
@@ -76,7 +81,8 @@ void WebContentsPermissionHelper::RequestMediaAccessPermission(
   auto callback = base::Bind(&MediaAccessAllowed, request, response_callback);
   // The permission type doesn't matter here, AUDIO_CAPTURE/VIDEO_CAPTURE
   // are presented as same type in content_converter.h.
-  RequestPermission(content::PermissionType::AUDIO_CAPTURE, callback);
+  RequestPermission(content::PermissionType::AUDIO_CAPTURE, callback,
+                    false, request.security_origin);
 }
 
 void WebContentsPermissionHelper::RequestWebNotificationPermission(

atom/browser/web_contents_permission_helper.h

@@ -46,7 +46,8 @@ class WebContentsPermissionHelper
   void RequestPermission(
       content::PermissionType permission,
       const base::Callback<void(bool)>& callback,
-      bool user_gesture = false);
+      bool user_gesture = false,
+      const GURL& security_origin = GURL());
 
   content::WebContents* web_contents_;