Cleanup restore offsets at end of SkPicture recording

Review URL: http://codereview.appspot.com/6355099/
TEST=skia unit test CanvasTest, test step TwoClipOps
BUG=https://code.google.com/p/chromium/issues/detail?id=133432



git-svn-id: http://skia.googlecode.com/svn/trunk@4577 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkPictureRecord.h b/src/core/SkPictureRecord.h
index 7e5f086..c970696 100644
--- a/src/core/SkPictureRecord.h
+++ b/src/core/SkPictureRecord.h
@@ -95,6 +95,8 @@
     }
 
     bool shouldFlattenPixels(const SkBitmap&) const;
+
+    void endRecording();
 private:
     struct PixelRefDictionaryEntry {
         uint32_t fKey; // SkPixelRef GenerationID.