Optimize tiling management
Bug #7186819

Change-Id: Iebc42a6e9c96ad5605fbbe1539aa887695d2e829
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index 10ba86e..4bbdde1 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -351,8 +351,7 @@
      * This method needs to be invoked every time getTargetFbo() is
      * bound again.
      */
-    void startTiling();
-    void startTiling(const sp<Snapshot>& snapshot);
+    void startTiling(const sp<Snapshot>& snapshot, bool opaque = false);
 
     /**
      * Tells the GPU that we are done drawing the frame or that we