Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkPerlinNoiseShader.cpp

Index: src/effects/SkPerlinNoiseShader.cpp
diff --git a/src/effects/SkPerlinNoiseShader.cpp b/src/effects/SkPerlinNoiseShader.cpp
index 8c608fa0366c134dae85d1a4d2178be59dd9a1d5..019258972dbda909c92cb1c214ad22dc35406d32 100644
--- a/src/effects/SkPerlinNoiseShader.cpp
+++ b/src/effects/SkPerlinNoiseShader.cpp
@@ -49,6 +49,11 @@
 
     // returns t * t * (3 - 2 * t)
     return SkScalarMul(SkScalarSquare(t), SK_Scalar3 - 2 * t);
+}
+
+bool perlin_noise_type_is_valid(SkPerlinNoiseShader::Type type) {
+    return (SkPerlinNoiseShader::kFractalNoise_Type == type) ||
+           (SkPerlinNoiseShader::kTurbulence_Type == type);
 }
 
 } // end namespace
@@ -282,6 +287,22 @@
 {
     SkASSERT(numOctaves >= 0 && numOctaves < 256);
 }
+
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkPerlinNoiseShader::SkPerlinNoiseShader(SkReadBuffer& buffer) : INHERITED(buffer) {
+    fType           = (SkPerlinNoiseShader::Type) buffer.readInt();
+    fBaseFrequencyX = buffer.readScalar();
+    fBaseFrequencyY = buffer.readScalar();
+    fNumOctaves     = buffer.readInt();
+    fSeed           = buffer.readScalar();
+    fStitchTiles    = buffer.readBool();
+    fTileSize.fWidth  = buffer.readInt();
+    fTileSize.fHeight = buffer.readInt();
+    buffer.validate(perlin_noise_type_is_valid(fType) &&
+                    (fNumOctaves >= 0) && (fNumOctaves <= 255) &&
+                    (fStitchTiles != fTileSize.isEmpty()));
+}
+#endif
 
 SkPerlinNoiseShader::~SkPerlinNoiseShader() {
 }
@@ -943,7 +964,7 @@
                                               const SkMatrix* externalLocalMatrix,
                                               GrColor* paintColor, GrFragmentProcessor** fp) const {
     SkASSERT(context);
-
+    
     *paintColor = SkColor2GrColorJustAlpha(paint.getColor());
 
     SkMatrix localMatrix = this->getLocalMatrix();