Fix use-after-move in media/webrtc permission prompting code

chrome/browser/media/webrtc/media_stream_devices_controller.cc

Index: chrome/browser/media/webrtc/media_stream_devices_controller.cc
diff --git a/chrome/browser/media/webrtc/media_stream_devices_controller.cc b/chrome/browser/media/webrtc/media_stream_devices_controller.cc
index 9a867c301c00791fd34809f48f475edc0d427cda..768ef2b0fc9b8e5b0b2fcc5ff5592526b00fd55b 100644
--- a/chrome/browser/media/webrtc/media_stream_devices_controller.cc
+++ b/chrome/browser/media/webrtc/media_stream_devices_controller.cc
@@ -430,14 +430,16 @@ void MediaStreamDevicesController::RequestPermissionsWithDelegate(
       new MediaStreamDevicesController(web_contents, request, callback));
 
   // Show a prompt if needed.
-  if (controller->IsAskingForAudio() || controller->IsAskingForVideo()) {
+  bool is_asking_for_audio = controller->IsAskingForAudio();
+  bool is_asking_for_video = controller->IsAskingForVideo();
+  if (is_asking_for_audio || is_asking_for_video) {
     Profile* profile =
         Profile::FromBrowserContext(web_contents->GetBrowserContext());
     delegate->ShowPrompt(
         request.user_gesture, web_contents,
         base::MakeUnique<Request>(
-            profile, controller->IsAskingForAudio(),
-            controller->IsAskingForVideo(), request.security_origin,
+            profile, is_asking_for_audio, is_asking_for_video,
+            request.security_origin,
             base::Bind(&MediaStreamDevicesController::PromptAnswered,
                        base::Passed(&controller))));
     return;