diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index dc4ceb0..e67a290 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -831,6 +831,8 @@
 
     pid_t getOwnerPid() { return mOwnerPid; }
 
+    int32_t getOwnerAppId() { return mOwnerAppId; }
+
     // This layer is not a clone, but it's the parent to the cloned hierarchy. The
     // variable mClonedChild represents the top layer that will be cloned so this
     // layer will be the parent of mClonedChild.
@@ -1056,6 +1058,8 @@
     // If created from a system process, the value can be passed in.
     pid_t mOwnerPid;
 
+    int32_t mOwnerAppId;
+
     // Keeps track of the time SF latched the last buffer from this layer.
     // Used in buffer stuffing analysis in FrameTimeline.
     nsecs_t mLastLatchTime = 0;
@@ -1065,6 +1069,10 @@
     sp<Fence> mLastClientCompositionFence;
     bool mClearClientCompositionFenceOnLayerDisplayed = false;
 private:
+    // Range of uids allocated for a user.
+    // This value is taken from android.os.UserHandle#PER_USER_RANGE.
+    static constexpr int32_t PER_USER_RANGE = 100000;
+
     friend class SlotGenerationTest;
     friend class TransactionFrameTracerTest;
     friend class TransactionSurfaceFrameTest;