Simplify flattening to just write enough to call the factory

src/effects/SkColorFilterImageFilter.cpp

Index: src/effects/SkColorFilterImageFilter.cpp
diff --git a/src/effects/SkColorFilterImageFilter.cpp b/src/effects/SkColorFilterImageFilter.cpp
index 2c3706769fa400a91e8ffdf3aa9a1e03c097e2e1..94bc6059f74f9a033b93442f38d000f3c500b4f3 100755
--- a/src/effects/SkColorFilterImageFilter.cpp
+++ b/src/effects/SkColorFilterImageFilter.cpp
@@ -83,14 +83,20 @@ SkColorFilterImageFilter::SkColorFilterImageFilter(SkColorFilter* cf,
     SkSafeRef(cf);
 }
 
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
 SkColorFilterImageFilter::SkColorFilterImageFilter(SkReadBuffer& buffer)
   : INHERITED(1, buffer) {
     fColorFilter = buffer.readColorFilter();
 }
+#endif
+
+SkFlattenable* SkColorFilterImageFilter::CreateProc(SkReadBuffer& buffer) {
+    SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
+    return Create(buffer.readColorFilter(), common.inputAt(0), &common.cropRect());
+}
 
 void SkColorFilterImageFilter::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
-
     buffer.writeFlattenable(fColorFilter);
 }