Disable LCD text when rasterizing SkPictureShader tiles.

src/core/SkPictureShader.cpp

Index: src/core/SkPictureShader.cpp
diff --git a/src/core/SkPictureShader.cpp b/src/core/SkPictureShader.cpp
index 36b55cae6666053357ac73dd0d6f0c85727476d8..adf2bb63a8bbdffe7c7e5a95f61c3088f66b20e4 100644
--- a/src/core/SkPictureShader.cpp
+++ b/src/core/SkPictureShader.cpp
@@ -194,7 +194,9 @@ SkShader* SkPictureShader::refBitmapShader(const SkMatrix& matrix, const SkMatri
         }
         bm.eraseColor(SK_ColorTRANSPARENT);
 
-        SkCanvas canvas(bm);
+        // Always disable LCD text, since we can't assume our image will be opaque.
+        SkCanvas canvas(bm, SkSurfaceProps(0, kUnknown_SkPixelGeometry));
+
         canvas.scale(tileScale.width(), tileScale.height());
         canvas.translate(-fTile.x(), -fTile.y());
         canvas.drawPicture(fPicture);