Remove uniqueID from all filter serialization.

src/effects/SkXfermodeImageFilter.cpp

Index: src/effects/SkXfermodeImageFilter.cpp
diff --git a/src/effects/SkXfermodeImageFilter.cpp b/src/effects/SkXfermodeImageFilter.cpp
index 2ba5ec5160e703e8e16cf147d3ccb0907b19fed1..c3f8487ab6fe4f12718f6323675e6d7f924af331 100644
--- a/src/effects/SkXfermodeImageFilter.cpp
+++ b/src/effects/SkXfermodeImageFilter.cpp
@@ -22,9 +22,8 @@
 
 SkXfermodeImageFilter::SkXfermodeImageFilter(SkXfermode* mode,
                                              SkImageFilter* inputs[2],
-                                             const CropRect* cropRect,
-                                             uint32_t uniqueID)
-  : INHERITED(2, inputs, cropRect, uniqueID), fMode(mode) {
+                                             const CropRect* cropRect)
+  : INHERITED(2, inputs, cropRect), fMode(mode) {
     SkSafeRef(fMode);
 }
 
@@ -35,7 +34,7 @@ SkXfermodeImageFilter::~SkXfermodeImageFilter() {
 SkFlattenable* SkXfermodeImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2);
     SkAutoTUnref<SkXfermode> mode(buffer.readXfermode());
-    return Create(mode, common.getInput(0), common.getInput(1), &common.cropRect(), common.uniqueID());
+    return Create(mode, common.getInput(0), common.getInput(1), &common.cropRect());
 }
 
 void SkXfermodeImageFilter::flatten(SkWriteBuffer& buffer) const {