Plumbing mipmaps to the point of creation.

src/image/SkImage.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkBitmapCache.h"
 #include "SkCanvas.h"
@@ skipping 481 matching lines @@
 
 SkImage* SkImage::NewTextureFromPixmap(GrContext* ctx, const SkPixmap& pmap, SkBudgeted budgeted) {
     return MakeTextureFromPixmap(ctx, pmap, budgeted).release();
 }
 
 SkImage* SkImage::NewFromDeferredTextureImageData(GrContext* ctx, const void* data,
                                                   SkBudgeted budgeted) {
     return MakeFromDeferredTextureImageData(ctx, data, budgeted).release();
 }
 #endif
+
+sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&, const GrMipLevel* texels,
+                                     int mipLevelCount, SkBudgeted) {
+    return nullptr;
+}