GN: add tests to DM

tests/ImageTest.cpp

Index: tests/ImageTest.cpp
diff --git a/tests/ImageTest.cpp b/tests/ImageTest.cpp
index 72dc9432e39981df1fd394fd576a433cc0b75d6c..2bbff7d2bf3ae2bc20cd6136aac1d00287a74292 100644
--- a/tests/ImageTest.cpp
+++ b/tests/ImageTest.cpp
@@ -8,7 +8,6 @@
 #include <functional>
 #include <initializer_list>
 #include <vector>
-#include "DMGpuSupport.h"
 
 #include "SkAutoPixmapStorage.h"
 #include "SkBitmap.h"
@@ -1001,11 +1000,11 @@ DEF_TEST(image_roundtrip_encode, reporter) {
     auto img0 = SkImage::MakeFromBitmap(bm0);
     sk_sp<SkData> data(img0->encode(SkImageEncoder::kPNG_Type, 100));
     auto img1 = SkImage::MakeFromEncoded(data);
-    
+
     SkBitmap bm1;
     bm1.allocPixels(SkImageInfo::MakeN32(256, 256, kPremul_SkAlphaType));
     img1->readPixels(bm1.info(), bm1.getPixels(), bm1.rowBytes(), 0, 0);
-    
+
     REPORTER_ASSERT(reporter, equal(bm0, bm1));
 }