Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

samplecode/SampleAll.cpp

Index: samplecode/SampleAll.cpp
diff --git a/samplecode/SampleAll.cpp b/samplecode/SampleAll.cpp
index f5a7c143f4e3b8e36bbe4d147c9b8ff150306891..19e692f518bfe2204744d8f11440df7651638622 100644
--- a/samplecode/SampleAll.cpp
+++ b/samplecode/SampleAll.cpp
@@ -172,6 +172,11 @@
         dst->addCircle(loc.fX, loc.fY, fRadius);
     }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+    Dot2DPathEffect(SkReadBuffer& buffer) : INHERITED(buffer) {
+        fRadius = buffer.readScalar();
+    }
+#endif
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         this->INHERITED::flatten(buffer);
         buffer.writeScalar(fRadius);