remove unneeded preroll

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 5a48476db03bb9533dac2ef2833d4de5b4df5f45..5b2f7a99f754c78e68aed7b52dfd000a708ec4a8 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -171,22 +171,6 @@ public:
      */
     bool willPlayBackBitmaps() const;
 
-    /**
-     *  This is a general hint that the picture will (soon) be drawn into a SkCanvas with
-     *  corresponding attributes (e.g. clip, matrix, props). No drawing occurs, but some
-     *  expensive operations may be run (e.g. image decoding).
-     *
-     *  Any of the parameters may be NULL.
-     *
-     *  @param srcBounds If not NULL, this is the subset of the picture (in the same coordinates
-     *                   as the picture's bounds) that preroll() should focus on.
-     *  @param initialMatrix If not NULL, this is the initialMatrix that is expected when the
-     *                       picture is actually drawn.
-     *  @param props If not NULL, these are the expected props when the picture is actually drawn.
-     */
-    void preroll(const SkRect* srcBounds, const SkMatrix* initialMatrix, const SkSurfaceProps*,
-                 void* gpuCacheAccessor) const;
-
     /** Return true if the SkStream/Buffer represents a serialized picture, and
         fills out SkPictInfo. After this function returns, the data source is not
         rewound so it will have to be manually reset before passing to