Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkDropShadowImageFilter.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDropShadowImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 11 matching lines @@
     : INHERITED(1, &input, cropRect, uniqueID)
     , fDx(dx)
     , fDy(dy)
     , fSigmaX(sigmaX)
     , fSigmaY(sigmaY)
     , fColor(color)
     , fShadowMode(shadowMode)
 {
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkDropShadowImageFilter::SkDropShadowImageFilter(SkReadBuffer& buffer)
+ : INHERITED(1, buffer) {
+    fDx = buffer.readScalar();
+    fDy = buffer.readScalar();
+    fSigmaX = buffer.readScalar();
+    fSigmaY = buffer.readScalar();
+    fColor = buffer.readColor();
+    fShadowMode = buffer.isVersionLT(SkReadBuffer::kDropShadowMode_Version) ?
+                  kDrawShadowAndForeground_ShadowMode :
+                  static_cast<ShadowMode>(buffer.readInt());
+    buffer.validate(SkScalarIsFinite(fDx) &&
+                    SkScalarIsFinite(fDy) &&
+                    SkScalarIsFinite(fSigmaX) &&
+                    SkScalarIsFinite(fSigmaY));
+}
+#endif
+
 SkFlattenable* SkDropShadowImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     SkScalar dx = buffer.readScalar();
     SkScalar dy = buffer.readScalar();
     SkScalar sigmaX = buffer.readScalar();
     SkScalar sigmaY = buffer.readScalar();
     SkColor color = buffer.readColor();
     ShadowMode shadowMode = buffer.isVersionLT(SkReadBuffer::kDropShadowMode_Version) ?
                             kDrawShadowAndForeground_ShadowMode :
                             static_cast<ShadowMode>(buffer.readInt());
@@ skipping 87 matching lines @@
                   SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
     if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
         bounds.join(src);
     }
     if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
         return false;
     }
     *dst = bounds;
     return true;
 }