Use a smart pointer for SkColorSpace factories

This should fix master-skia in Android because we no longer need
to include src/core for SkCodec.h.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1766413002

Review URL: https://codereview.chromium.org/1766413002
diff --git a/src/codec/SkBmpCodec.h b/src/codec/SkBmpCodec.h
index a54734f..a7e8e58 100644
--- a/src/codec/SkBmpCodec.h
+++ b/src/codec/SkBmpCodec.h
@@ -8,6 +8,7 @@
 #define SkBmpCodec_DEFINED
 
 #include "SkCodec.h"
+#include "SkColorSpace.h"
 #include "SkColorTable.h"
 #include "SkImageInfo.h"
 #include "SkStream.h"