use gpu-image instead of wrapping in a bitmap for specialimage

src/core/SkSpecialImage.cpp

Index: src/core/SkSpecialImage.cpp
diff --git a/src/core/SkSpecialImage.cpp b/src/core/SkSpecialImage.cpp
index 081b2a5b765ed560a915c917af557ff39963ed06..f903270dff72dfd1569cbe9a9c9fe45d1dd0d69d 100644
--- a/src/core/SkSpecialImage.cpp
+++ b/src/core/SkSpecialImage.cpp
@@ -473,12 +473,11 @@ public:
         SkRect dst = SkRect::MakeXYWH(x, y,
                                       this->subset().width(), this->subset().height());
 
-        SkBitmap bm;
+        auto img = sk_sp<SkImage>(new SkImage_Gpu(fTexture->width(), fTexture->height(),
+                                                  this->uniqueID(), fAlphaType, fTexture.get(),
+                                                  SkBudgeted::kNo));
 
-        GrWrapTextureInBitmap(fTexture.get(),
-                              fTexture->width(), fTexture->height(), this->isOpaque(), &bm);
-
-        canvas->drawBitmapRect(bm, this->subset(),
+        canvas->drawImageRect(img, this->subset(),
                                dst, paint, SkCanvas::kStrict_SrcRectConstraint);
     }