Simplify flattening to just write enough to call the factory

src/effects/gradients/SkTwoPointConicalGradient.cpp

Index: src/effects/gradients/SkTwoPointConicalGradient.cpp
diff --git a/src/effects/gradients/SkTwoPointConicalGradient.cpp b/src/effects/gradients/SkTwoPointConicalGradient.cpp
index 91856c88a2eabdeb58f131e6e1d9eadf9dbed541..02375786d105cb96c7fc4821cd9a65a0eb4c6177 100644
--- a/src/effects/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/effects/gradients/SkTwoPointConicalGradient.cpp
@@ -343,6 +343,7 @@ SkShader::GradientType SkTwoPointConicalGradient::asAGradient(
     return kConical_GradientType;
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
 SkTwoPointConicalGradient::SkTwoPointConicalGradient(
     SkReadBuffer& buffer)
     : INHERITED(buffer),
@@ -366,9 +367,25 @@ SkTwoPointConicalGradient::SkTwoPointConicalGradient(
     }
     this->init();
 };
+#endif
+
+SkFlattenable* SkTwoPointConicalGradient::CreateProc(SkReadBuffer& buffer) {
+    DescriptorScope desc;
+    if (!desc.unflatten(buffer)) {
+        return NULL;
+    }
+    const SkPoint c1 = buffer.readPoint();
+    const SkPoint c2 = buffer.readPoint();
+    const SkScalar r1 = buffer.readScalar();
+    const SkScalar r2 = buffer.readScalar();
+    /* flippedGrad = */ buffer.readBool();
+
+    return SkGradientShader::CreateTwoPointConical(c1, r1, c2, r2, desc.fColors, desc.fPos,
+                                                   desc.fCount, desc.fTileMode, desc.fGradFlags,
+                                                   desc.fLocalMatrix);
+}
 
-void SkTwoPointConicalGradient::flatten(
-    SkWriteBuffer& buffer) const {
+void SkTwoPointConicalGradient::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePoint(fCenter1);
     buffer.writePoint(fCenter2);