Roll Flutter Engine from 5e504af1dc14 to 315d0c2051c5 (1 revision) (#112358)

https://dart.googlesource.com/external/github.com/flutter/flutter/+/9e4e44bb34d36e183adb3005545bb5b1177a7fe5
diff --git a/commits.json b/commits.json
index 63d32bd..720ebdb 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"1c232b584c57fcb43dadc1602b4b202ace80645a",
-  "external/github.com/flutter/flutter":"9382378f13d2bcddfbfd9a5fe3fa64ad140b517d",
+  "external/github.com/flutter/flutter":"9e4e44bb34d36e183adb3005545bb5b1177a7fe5",
   "sdk":"cfddeee68e0cf7451a2eee1a9fbbff8a8d9c0b92"
 }
\ No newline at end of file