Revert of Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkMergeImageFilter.cpp

 /*
  * Copyright 2012 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 "SkMergeImageFilter.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
@@ skipping 122 matching lines @@
     return Create(common.inputs(), count, NULL, &common.cropRect(), common.uniqueID());
 }
 
 void SkMergeImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeBool(fModes != NULL);
     if (fModes) {
         buffer.writeByteArray(fModes, countInputs() * sizeof(fModes[0]));
     }
 }
+
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkMergeImageFilter::SkMergeImageFilter(SkReadBuffer& buffer)
+  : INHERITED(-1, buffer) {
+    bool hasModes = buffer.readBool();
+    if (hasModes) {
+        this->initAllocModes();
+        int nbInputs = countInputs();
+        size_t size = nbInputs * sizeof(fModes[0]);
+        SkASSERT(buffer.getArrayCount() == size);
+        if (buffer.validate(buffer.getArrayCount() == size) &&
+            buffer.readByteArray(fModes, size)) {
+            for (int i = 0; i < nbInputs; ++i) {
+                buffer.validate(SkIsValidMode((SkXfermode::Mode)fModes[i]));
+            }
+        }
+    } else {
+        fModes = 0;
+    }
+}
+#endif