Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkMorphologyImageFilter.cpp

Index: src/effects/SkMorphologyImageFilter.cpp
diff --git a/src/effects/SkMorphologyImageFilter.cpp b/src/effects/SkMorphologyImageFilter.cpp
index 3d27d10ee12197d52d9cf9ffd4d3f2f369ec9b12..9c97c35bc27601dbd1d141f39774ad9c80e09e80 100644
--- a/src/effects/SkMorphologyImageFilter.cpp
+++ b/src/effects/SkMorphologyImageFilter.cpp
@@ -20,6 +20,16 @@
 #include "gl/GrGLProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "effects/Gr1DKernelEffect.h"
+#endif
+
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkMorphologyImageFilter::SkMorphologyImageFilter(SkReadBuffer& buffer)
+  : INHERITED(1, buffer) {
+    fRadius.fWidth = buffer.readInt();
+    fRadius.fHeight = buffer.readInt();
+    buffer.validate((fRadius.fWidth >= 0) &&
+                    (fRadius.fHeight >= 0));
+}
 #endif
 
 SkMorphologyImageFilter::SkMorphologyImageFilter(int radiusX,