Reimplement deserialization of SkImageFilter's uniqueID.

src/effects/SkBlurImageFilter.cpp

Index: src/effects/SkBlurImageFilter.cpp
diff --git a/src/effects/SkBlurImageFilter.cpp b/src/effects/SkBlurImageFilter.cpp
index 71bc8114dfd9d85b3d0cab75077baab563572e37..dea392b4b58a0f0f3333aeb655801a7ba845b887 100644
--- a/src/effects/SkBlurImageFilter.cpp
+++ b/src/effects/SkBlurImageFilter.cpp
@@ -38,16 +38,16 @@ SkBlurImageFilter::SkBlurImageFilter(SkReadBuffer& buffer)
 SkBlurImageFilter::SkBlurImageFilter(SkScalar sigmaX,
                                      SkScalar sigmaY,
                                      SkImageFilter* input,
-                                     const CropRect* cropRect)
-    : INHERITED(1, &input, cropRect), fSigma(SkSize::Make(sigmaX, sigmaY)) {
-    SkASSERT(sigmaX >= 0 && sigmaY >= 0);
+                                     const CropRect* cropRect,
+                                     uint32_t uniqueID)
+    : INHERITED(1, &input, cropRect, uniqueID), fSigma(SkSize::Make(sigmaX, sigmaY)) {
 }
 
 SkFlattenable* SkBlurImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     SkScalar sigmaX = buffer.readScalar();
     SkScalar sigmaY = buffer.readScalar();
-    return Create(sigmaX, sigmaY, common.getInput(0), &common.cropRect());
+    return Create(sigmaX, sigmaY, common.getInput(0), &common.cropRect(), common.uniqueID());
 }
 
 void SkBlurImageFilter::flatten(SkWriteBuffer& buffer) const {