diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index a6eb7ad..b0d980b 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -180,6 +180,8 @@
 
     void waitOnFences();
 
+    bool isSwapChainStuffed();
+
     EGLint mLastFrameWidth = 0;
     EGLint mLastFrameHeight = 0;
 
@@ -198,7 +200,9 @@
     struct SwapHistory {
         SkRect damage;
         nsecs_t vsyncTime;
-        nsecs_t swapTime;
+        nsecs_t swapCompletedTime;
+        nsecs_t dequeueDuration;
+        nsecs_t queueDuration;
     };
 
     RingBuffer<SwapHistory, 3> mSwapHistory;