Revert of remvoe duplicate impl for SkImageInfo flattening

src/images/SkImageRef_ashmem.cpp

Index: src/images/SkImageRef_ashmem.cpp
diff --git a/src/images/SkImageRef_ashmem.cpp b/src/images/SkImageRef_ashmem.cpp
index 383a487d2be60c25fd42f428db93f39ab11ea8f8..0dba1d119140d4d89615e72926994c6a6a7afb1c 100644
--- a/src/images/SkImageRef_ashmem.cpp
+++ b/src/images/SkImageRef_ashmem.cpp
@@ -31,10 +31,10 @@
     return newsize;
 }
 
-SkImageRef_ashmem::SkImageRef_ashmem(const SkImageInfo& info,
-                                     SkStreamRewindable* stream,
-                                     int sampleSize)
-        : SkImageRef(info, stream, sampleSize) {
+SkImageRef_ashmem::SkImageRef_ashmem(SkStreamRewindable* stream,
+                                             SkBitmap::Config config,
+                                             int sampleSize)
+        : SkImageRef(stream, config, sampleSize) {
 
     fRec.fFD = -1;
     fRec.fAddr = NULL;