Fix GC issue, fix local shader transformations.

Change-Id: I208bdf89815dcd18dcadd43df932a77362918435
diff --git a/libs/hwui/Matrix.h b/libs/hwui/Matrix.h
index ebc8b29..c247a67 100644
--- a/libs/hwui/Matrix.h
+++ b/libs/hwui/Matrix.h
@@ -104,10 +104,8 @@
     void copyTo(float* v) const;
     void copyTo(SkMatrix& v) const;
 
-    /**
-     * Does not apply rotations!
-     */
     void mapRect(Rect& r) const;
+    void mapPoint(float& x, float& y) const;
 
     float getTranslateX();
     float getTranslateY();