Reimplement deserialization of SkImageFilter's uniqueID.

src/core/SkImageFilter.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 "SkImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 92 matching lines @@
     if (buffer.isVersionLT(SkReadBuffer::kImageFilterUniqueID_Version)) {
         fUniqueID = next_image_filter_unique_id();
     } else {
         fUniqueID = buffer.readUInt();
     }
     return buffer.isValid();
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
-SkImageFilter::SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect)
+SkImageFilter::SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect, uint32_t uniqueID)
   : fInputCount(inputCount),
     fInputs(new SkImageFilter*[inputCount]),
     fUsesSrcInput(false),
     fCropRect(cropRect ? *cropRect : CropRect(SkRect(), 0x0)),
-    fUniqueID(next_image_filter_unique_id()) {
+    fUniqueID(uniqueID ? uniqueID : next_image_filter_unique_id()) {
     for (int i = 0; i < inputCount; ++i) {
         if (NULL == inputs[i] || inputs[i]->usesSrcInput()) {
             fUsesSrcInput = true;
         }
         fInputs[i] = inputs[i];
         SkSafeRef(fInputs[i]);
     }
 }
 
 SkImageFilter::~SkImageFilter() {
@@ skipping 363 matching lines @@
 } // namespace
 
 SkImageFilter::Cache* SkImageFilter::Cache::Create(size_t maxBytes) {
     return SkNEW_ARGS(CacheImpl, (maxBytes));
 }
 
 SkImageFilter::Cache* SkImageFilter::Cache::Get() {
     SK_DECLARE_STATIC_LAZY_PTR(SkImageFilter::Cache, cache, CreateCache);
     return cache.get();
 }