Revert "makeSurface defaults to raster"

This reverts commit 29a4a684af2525d78a1090fba2d3dea2b6a59fc7.

Reason for revert: some configs fail

Original change's description:
> makeSurface defaults to raster
> 
> Rather that returning nullptr for a recording
> canvas, return a raster canvas instead.
> 
> R=​reed@google.com,robertphillips@google.com
> 
> Bug: skia:
> Change-Id: I211d8ef368b9aec6d14cc72d1652ac6a03f3fa7b
> Reviewed-on: https://skia-review.googlesource.com/151666
> Commit-Queue: Cary Clark <caryclark@skia.org>
> Reviewed-by: Robert Phillips <robertphillips@google.com>

TBR=robertphillips@google.com,reed@google.com,caryclark@skia.org

Change-Id: I82d2c3e4589a2ca8523bbf86884ed68b1431631d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/151824
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>
diff --git a/gm/dstreadshuffle.cpp b/gm/dstreadshuffle.cpp
index 90c44b3..c4c19fc 100644
--- a/gm/dstreadshuffle.cpp
+++ b/gm/dstreadshuffle.cpp
@@ -154,6 +154,20 @@
                                      canvas->imageInfo().refColorSpace());
         }
         auto surf = canvas->makeSurface(info);
+        if (!surf) {
+            // Fall back to raster. Raster supports only one of the 8 bit per-channel RGBA or BGRA
+            // formats. This fall back happens when running with --preAbandonGpuContext.
+            if ((info.colorType() == kRGBA_8888_SkColorType ||
+                 info.colorType() == kBGRA_8888_SkColorType) &&
+                info.colorType() != kN32_SkColorType) {
+                info = SkImageInfo::Make(35, 35,
+                                         kN32_SkColorType,
+                                         canvas->imageInfo().alphaType(),
+                                         canvas->imageInfo().refColorSpace());
+            }
+            surf = SkSurface::MakeRaster(info);
+            SkASSERT(surf);
+        }
         canvas->scale(5.f, 5.f);
         canvas->translate(67.f, 10.f);
         DrawHairlines(surf->getCanvas());