Reintroduce plumbing for user gesture into permission system.

chromecast/browser/cast_permission_manager.h

Index: chromecast/browser/cast_permission_manager.h
diff --git a/chromecast/browser/cast_permission_manager.h b/chromecast/browser/cast_permission_manager.h
index d96ec8e0a8ed0863c0ffabe714f25f642be12fd1..00848e2ee14d2e81788aca0aba93f46a3dee96a8 100644
--- a/chromecast/browser/cast_permission_manager.h
+++ b/chromecast/browser/cast_permission_manager.h
@@ -22,12 +22,14 @@ class CastPermissionManager : public content::PermissionManager {
       content::PermissionType permission,
       content::RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
+      bool user_gesture,
       const base::Callback<void(blink::mojom::PermissionStatus)>& callback)
       override;
   int RequestPermissions(
       const std::vector<content::PermissionType>& permission,
       content::RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
+      bool user_gesture,
       const base::Callback<
           void(const std::vector<blink::mojom::PermissionStatus>&)>& callback)
       override;