Remove SAA code when SK_FORCE_AAA is defined

We already removed AAA when SK_DISABLE_AAA was defined. This lets us
flip the define and avoid (too much?) code bloat.

From local testing, it appears that AAA is 60k larger than SAA? Sigh.

Change-Id: Ie185de804b9face33220820ff6cdccaad2c92c2c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/658016
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Herb Derby <herb@google.com>
diff --git a/src/core/SkScan_SAAPath.cpp b/src/core/SkScan_SAAPath.cpp
index 0ae6ce5..ec9b1ec 100644
--- a/src/core/SkScan_SAAPath.cpp
+++ b/src/core/SkScan_SAAPath.cpp
@@ -14,6 +14,14 @@
 #include "src/core/SkAntiRun.h"
 #include "src/core/SkBlitter.h"
 
+#if defined(SK_FORCE_AAA)
+
+void SkScan::SAAFillPath(const SkPath&, SkBlitter*, const SkIRect&, const SkIRect&, bool) {
+    SkDEBUGFAIL("SAA Disabled");
+}
+
+#else
+
 #define SHIFT   SK_SUPERSAMPLE_SHIFT
 #define SCALE   (1 << SHIFT)
 #define MASK    (SCALE - 1)
@@ -599,3 +607,5 @@
         sk_fill_path(path, clipBounds, &superBlit, ir.fTop, ir.fBottom, SHIFT, containedInClip);
     }
 }
+
+#endif  // defined(SK_FORCE_AAA)