Add API to copy a window

Change-Id: I9bb5209010db6665be4b6f8db81a6fc1b7debc45
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index d812970..d4aaea6 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -127,7 +127,8 @@
     ANDROID_API void removeFrameMetricsObserver(FrameMetricsObserver* observer);
     ANDROID_API long getDroppedFrameReportCount();
 
-    ANDROID_API static int copySurfaceInto(sp<Surface>& surface, SkBitmap* bitmap);
+    ANDROID_API static int copySurfaceInto(sp<Surface>& surface,
+            int left, int top, int right, int bottom, SkBitmap* bitmap);
     ANDROID_API static void prepareToDraw(const SkBitmap& bitmap);
 
 private: