Do not use GrBicubic effect when downscaling. Also, don't use glTexStorage as it interferes with de…

include/core/SkMatrix.h

Index: include/core/SkMatrix.h
diff --git a/include/core/SkMatrix.h b/include/core/SkMatrix.h
index dad5ff92f58904f4b8ed7c18e3d4375a9de23cfe..d7726f6d4dc7a1d6fcdf47ebac5cc995cc43b926 100644
--- a/include/core/SkMatrix.h
+++ b/include/core/SkMatrix.h
@@ -574,6 +574,14 @@ public:
     SkDEVCODE(void toString(SkString*) const;)
 
     /**
+     * Calculates the minimum stretching factor of the matrix. If the matrix has
+     * perspective -1 is returned.
+     *
+     * @return minumum strecthing factor
+     */
+    SkScalar getMinStretch() const;
+
+    /**
      * Calculates the maximum stretching factor of the matrix. If the matrix has
      * perspective -1 is returned.
      *