Add new SkImage factory to create from GrBackendTexture with SkColorType

Bug: skia:
Change-Id: I46bdc54b6d9cdacc8f5a06644aa6b110837879f0
Reviewed-on: https://skia-review.googlesource.com/84342
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/gm/rectangletexture.cpp b/gm/rectangletexture.cpp
index c71a51c..2fb64be 100644
--- a/gm/rectangletexture.cpp
+++ b/gm/rectangletexture.cpp
@@ -108,11 +108,13 @@
         GrGLTextureInfo info;
         info.fID = id;
         info.fTarget = TARGET;
+        info.fFormat = GR_GL_RGBA8;
 
-        GrBackendTexture rectangleTex(width, height, kRGBA_8888_GrPixelConfig, info);
+        GrBackendTexture rectangleTex(width, height, GrMipMapped::kNo, info);
 
         if (sk_sp<SkImage> image = SkImage::MakeFromAdoptedTexture(context, rectangleTex,
-                                                                   kTopLeft_GrSurfaceOrigin)) {
+                                                                   kTopLeft_GrSurfaceOrigin,
+                                                                   kRGBA_8888_SkColorType)) {
             return image;
         }
         GR_GL_CALL(gl, DeleteTextures(1, &id));