Have RT drive window positioning

Bug: 22802885

Change-Id: I6beed5474d3a943b16e9097f7bd61ce3cbd37505
diff --git a/libs/hwui/DamageAccumulator.h b/libs/hwui/DamageAccumulator.h
index e44fc20..250296e 100644
--- a/libs/hwui/DamageAccumulator.h
+++ b/libs/hwui/DamageAccumulator.h
@@ -57,7 +57,7 @@
     // Returns the current dirty area, *NOT* transformed by pushed transforms
     void peekAtDirty(SkRect* dest) const;
 
-    void computeCurrentTransform(Matrix4* outMatrix) const;
+    ANDROID_API void computeCurrentTransform(Matrix4* outMatrix) const;
 
     void finish(SkRect* totalDirty);