Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkBlurImageFilter.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkBlurImageFilter.h"
 #include "SkColorPriv.h"
@@ skipping 13 matching lines @@
 #define MAX_SIGMA SkIntToScalar(532)
 
 static SkVector mapSigma(const SkSize& localSigma, const SkMatrix& ctm) {
     SkVector sigma = SkVector::Make(localSigma.width(), localSigma.height());
     ctm.mapVectors(&sigma, 1);
     sigma.fX = SkMinScalar(SkScalarAbs(sigma.fX), MAX_SIGMA);
     sigma.fY = SkMinScalar(SkScalarAbs(sigma.fY), MAX_SIGMA);
     return sigma;
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkBlurImageFilter::SkBlurImageFilter(SkReadBuffer& buffer)
+  : INHERITED(1, buffer) {
+    fSigma.fWidth = buffer.readScalar();
+    fSigma.fHeight = buffer.readScalar();
+    buffer.validate(SkScalarIsFinite(fSigma.fWidth) &&
+                    SkScalarIsFinite(fSigma.fHeight) &&
+                    (fSigma.fWidth >= 0) &&
+                    (fSigma.fHeight >= 0));
+}
+#endif
+
 SkBlurImageFilter::SkBlurImageFilter(SkScalar sigmaX,
                                      SkScalar sigmaY,
                                      SkImageFilter* input,
                                      const CropRect* cropRect,
                                      uint32_t uniqueID)
     : INHERITED(1, &input, cropRect, uniqueID), fSigma(SkSize::Make(sigmaX, sigmaY)) {
 }
 
 SkFlattenable* SkBlurImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
@@ skipping 236 matching lines @@
                                                              true,
                                                              sigma.x(),
                                                              sigma.y()));
     WrapTexture(tex, rect.width(), rect.height(), result);
     return true;
 #else
     SkDEBUGFAIL("Should not call in GPU-less build");
     return false;
 #endif
 }