Reimplement deserialization of SkImageFilter's uniqueID.

include/core/SkImageFilter.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageFilter_DEFINED
 #define SkImageFilter_DEFINED
 
@@ skipping 219 matching lines @@
 
     private:
         CropRect fCropRect;
         // most filters accept at most 2 input-filters
         SkAutoSTArray<2, SkImageFilter*> fInputs;
         uint32_t fUniqueID;
 
         void allocInputs(int count);
     };
 
-    SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect = NULL);
+    SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect = NULL, uint32_t uniqueID = 0);
 
     virtual ~SkImageFilter();
 
     /**
      *  Constructs a new SkImageFilter read from an SkReadBuffer object.
      *
      *  @param inputCount    The exact number of inputs expected for this SkImageFilter object.
      *                       -1 can be used if the filter accepts any number of inputs.
      *  @param rb            SkReadBuffer object from which the SkImageFilter is read.
      */
@@ skipping 84 matching lines @@
  */
 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount)    \
     Common localVar;                                                \
     do {                                                            \
         if (!localVar.unflatten(buffer, expectedCount)) {           \
             return NULL;                                            \
         }                                                           \
     } while (0)
 
 #endif