Add staging for skia CL 304797

Bug: skia:104662
Change-Id: I186d6376b5685a1071ae5d57a871383422984b8c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2310889
Auto-Submit: Adlai Holler <adlai@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Adlai Holler <adlai@google.com>
Cr-Commit-Position: refs/heads/master@{#790555}

skia/config/SkUserConfig.h

@@ -226,6 +226,9 @@ SK_API void SkDebugf_FileLine(const char* file,
 // Staging for https://review.skia.org/304003
 #define SK_IMAGE_MAKE_WITH_FILTER_LEGACY_API
 
+// Staging for https://review.skia.org/304797
+#define SK_IMAGE_FLUSH_LEGACY_API
+
 ///////////////////////// Imported from BUILD.gn and skia_common.gypi
 
 /* In some places Skia can use static initializers for global initialization,