Add RAW decoding support to Skia

src/codec/SkCodec.cpp

Index: src/codec/SkCodec.cpp
diff --git a/src/codec/SkCodec.cpp b/src/codec/SkCodec.cpp
index 75e5c34f534639e569fadd9d80039a071de42ddf..cfeeb51d0d52f817d370d9d748f7cfc171785a1a 100644
--- a/src/codec/SkCodec.cpp
+++ b/src/codec/SkCodec.cpp
@@ -15,6 +15,9 @@
 #include "SkJpegCodec.h"
 #endif
 #include "SkPngCodec.h"
+#ifdef SK_CODEC_DECODES_RAW
+#include "SkRawCodec.h"
+#endif
 #include "SkStream.h"
 #include "SkWbmpCodec.h"
 #include "SkWebpCodec.h"
@@ -86,6 +89,11 @@ SkCodec* SkCodec::NewFromStream(SkStream* stream,
                 return proc.NewFromStream(streamDeleter.detach());
             }
         }
+
+#ifdef SK_CODEC_DECODES_RAW
+        // Try to treat the input as RAW if all the other checks failed.
+        return SkRawCodec::NewFromStream(streamDeleter.detach());
+#endif
     }
 
     return nullptr;