move SkImage::ColorType into SkColorType

src/ports/SkImageDecoder_empty.cpp

Index: src/ports/SkImageDecoder_empty.cpp
diff --git a/src/ports/SkImageDecoder_empty.cpp b/src/ports/SkImageDecoder_empty.cpp
index ff2fa02f2e1b50940ce070d2550a66653acce273..8a45dfac5556744060aacab34511d23e1b40bb98 100644
--- a/src/ports/SkImageDecoder_empty.cpp
+++ b/src/ports/SkImageDecoder_empty.cpp
@@ -84,7 +84,7 @@ SkBitmap::Allocator* SkImageDecoder::setAllocator(SkBitmap::Allocator*) {
 
 void SkImageDecoder::setSampleSize(int) {}
 
-bool SkImageDecoder::DecodeMemoryToTarget(const void*, size_t, SkImage::Info*,
+bool SkImageDecoder::DecodeMemoryToTarget(const void*, size_t, SkImageInfo*,
                                           const SkBitmapFactory::Target*) {
     return false;
 }