Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/core/SkBitmapProcShader.cpp

Index: src/core/SkBitmapProcShader.cpp
diff --git a/src/core/SkBitmapProcShader.cpp b/src/core/SkBitmapProcShader.cpp
index f01d55905824a34b3bfaa154fcaf0fb68c623abd..1a451fd5918de64c558edfe2cdb7a5c73b66eec1 100644
--- a/src/core/SkBitmapProcShader.cpp
+++ b/src/core/SkBitmapProcShader.cpp
@@ -39,6 +39,15 @@
     fTileModeY = (uint8_t)tmy;
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkBitmapProcShader::SkBitmapProcShader(SkReadBuffer& buffer) : INHERITED(buffer) {
+    buffer.readBitmap(&fRawBitmap);
+    fRawBitmap.setImmutable();
+    fTileModeX = buffer.readUInt();
+    fTileModeY = buffer.readUInt();
+}
+#endif
+
 SkShader::BitmapType SkBitmapProcShader::asABitmap(SkBitmap* texture,
                                                    SkMatrix* texM,
                                                    TileMode xy[]) const {