Flesh out backend textures and rendertargets to support Direct3D.

Add GrD3DTextureInfo and GrD3DBackendSurfaceInfo, and uses those
to initialize GrBackendTexture and GrBackendRendertarget.

Bug: skia:9935
Change-Id: I4571c1b3aa8115250ff748deb8cf4a95f80f1237
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/278036
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index f39877f..82366e9 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -6,7 +6,8 @@
 
 Milestone 83
 
-<Insert new notes here- top is most recent.>
+  * Fill out Direct3D parameters for backend textures and backend rendertargets.
+
   * SkImage::makeTextureImage() takes an optional SkBudgeted param
 
   * Made non-GL builds of GPU backend more robust.