Add a feature-controlled persistence checkbox to geolocation prompts on desktop Views platforms.

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 c64693645d851b129f2278f759d7e4f64fa70aa6..8d2a24c442e51202d52247a60845045093f6438a 100644
--- a/chrome/browser/media/webrtc/media_stream_devices_controller.h
+++ b/chrome/browser/media/webrtc/media_stream_devices_controller.h
@@ -63,8 +63,7 @@ class MediaStreamDevicesController : public PermissionRequest {
   // PermissionRequest instead of a custom infobar delegate.
   void GroupedRequestFinished(bool audio_accepted, bool video_accepted);
 
-  bool persist() const { return persist_; }
-  void set_persist(bool persist) { persist_ = persist; }
+  bool ShouldShowPersistenceToggle() const override;
 
   // PermissionRequest:
   int GetIconId() const override;
@@ -140,9 +139,6 @@ class MediaStreamDevicesController : public PermissionRequest {
   // audio/video devices was granted or not.
   content::MediaResponseCallback callback_;
 
-  // Whether the permissions granted or denied by the user should be persisted.
-  bool persist_;
-
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDevicesController);
 };