Add "interactive" UI integration tests for PermissionRequestManager.

chrome/browser/media/webrtc/media_stream_devices_controller.h

Index: chrome/browser/media/webrtc/media_stream_devices_controller.h
diff --git a/chrome/browser/media/webrtc/media_stream_devices_controller.h b/chrome/browser/media/webrtc/media_stream_devices_controller.h
index 2cc3427644e95c48a55bf23be090f820ade14623..d207c6acfae020e882173c7209295e8a26c5ff73 100644
--- a/chrome/browser/media/webrtc/media_stream_devices_controller.h
+++ b/chrome/browser/media/webrtc/media_stream_devices_controller.h
@@ -28,6 +28,10 @@ namespace policy {
 class MediaStreamDevicesControllerBrowserTest;
 }
 
+namespace test {
+class MediaStreamDevicesControllerTestApi;
+}
+
 class MediaStreamDevicesController : public PermissionRequest {
  public:
   static void RequestPermissions(
@@ -67,6 +71,7 @@ class MediaStreamDevicesController : public PermissionRequest {
 
  private:
   friend class MediaStreamDevicesControllerTest;
+  friend class test::MediaStreamDevicesControllerTestApi;
   friend class policy::MediaStreamDevicesControllerBrowserTest;
 
   MediaStreamDevicesController(content::WebContents* web_contents,