Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkEmbossMaskFilter.cpp

Index: src/effects/SkEmbossMaskFilter.cpp
diff --git a/src/effects/SkEmbossMaskFilter.cpp b/src/effects/SkEmbossMaskFilter.cpp
index 8fcd272646a4421b2f6d367d771a601f882dc04c..4841b92816459ccd9c61b7e413d0b885cdeb38a1 100644
--- a/src/effects/SkEmbossMaskFilter.cpp
+++ b/src/effects/SkEmbossMaskFilter.cpp
@@ -124,6 +124,15 @@
     return true;
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkEmbossMaskFilter::SkEmbossMaskFilter(SkReadBuffer& buffer) : SkMaskFilter(buffer) {
+    SkASSERT(buffer.getArrayCount() == sizeof(Light));
+    buffer.readByteArray(&fLight, sizeof(Light));
+    SkASSERT(fLight.fPad == 0); // for the font-cache lookup to be clean
+    fBlurSigma = buffer.readScalar();
+}
+#endif
+
 SkFlattenable* SkEmbossMaskFilter::CreateProc(SkReadBuffer& buffer) {
     Light light;
     if (buffer.readByteArray(&light, sizeof(Light))) {