Reimplement deserialization of SkImageFilter's uniqueID.

include/effects/SkOffsetImageFilter.h

Index: include/effects/SkOffsetImageFilter.h
diff --git a/include/effects/SkOffsetImageFilter.h b/include/effects/SkOffsetImageFilter.h
index d18dcae315efc801ff7c6f456528e50e98d71ca0..a870c0b8ee873e7da9c90775c6414f46903c03c9 100644
--- a/include/effects/SkOffsetImageFilter.h
+++ b/include/effects/SkOffsetImageFilter.h
@@ -16,17 +16,18 @@ class SK_API SkOffsetImageFilter : public SkImageFilter {
 
 public:
     static SkOffsetImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
-                                       const CropRect* cropRect = NULL) {
+                                       const CropRect* cropRect = NULL,
+                                       uint32_t uniqueID = 0) {
         if (!SkScalarIsFinite(dx) || !SkScalarIsFinite(dy)) {
             return NULL;
         }
-        return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect));
+        return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect, uniqueID));
     }
     virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
 
 protected:
-    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect* cropRect);
+    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input, const CropRect* cropRect, uint32_t uniqueID);
 #ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     explicit SkOffsetImageFilter(SkReadBuffer& buffer);
 #endif