Add gamma_correct option field to dm.json

dm/DM.cpp

Index: dm/DM.cpp
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 59c7def4d67d0dbee83fd9d3db10686f5a490a6b..d50c8966e51f00e4fd5dc3d0a4fc27ccf8022e8a 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -1017,12 +1017,19 @@ struct Task {
                             const char* ext,
                             SkStream* data, size_t len,
                             const SkBitmap* bitmap) {
+        bool gammaCorrect = false;
+        if (bitmap) {
+            gammaCorrect = bitmap->profileType() == kSRGB_SkColorProfileType
+                        || bitmap->  colorType() == kRGBA_F16_SkColorType;
+        }
+
         JsonWriter::BitmapResult result;
         result.name          = task.src->name();
         result.config        = task.sink.tag;
         result.sourceType    = task.src.tag;
         result.sourceOptions = task.src.options;
         result.ext           = ext;
+        result.gammaCorrect  = gammaCorrect;
         result.md5           = md5;
         JsonWriter::AddBitmapResult(result);