diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index 645b3d17a0..39ff76fbed 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -380,16 +380,12 @@ GrSemaphoresSubmitted GrDrawingManager::prepareSurfaceForExternalIO(
     if (auto* rt = surface->asRenderTarget()) {
         gpu->resolveRenderTarget(rt);
     }
-#if 0
-    // This is temporarily is disabled. See comment in SkImage_Gpu.cpp,
-    // new_wrapped_texture_common().
     if (auto* tex = surface->asTexture()) {
         if (tex->texturePriv().mipMapped() == GrMipMapped::kYes &&
             tex->texturePriv().mipMapsAreDirty()) {
             gpu->regenerateMipMapLevels(tex);
         }
     }
-#endif
     return result;
 }
 
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index 1d5ca96848..1dea80659a 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -290,17 +290,6 @@ static sk_sp<SkImage> new_wrapped_texture_common(GrContext* ctx,
     if (!proxy) {
         return nullptr;
     }
-#if 1
-    // Temporary fix for crbug.com/850617 that can be cleanly merged back to older branches. Assume
-    // any MIP levels on the incoming texture are dirty. The proper fix is to make them clean on
-    // export. See #if 0'ed out code in GrDrawingManager::prepareSurfaceForExternalIO().
-    SkASSERT(proxy->priv().isInstantiated());
-    if (auto* tex = proxy->priv().peekTexture()) {
-        if (tex->texturePriv().mipMapped() == GrMipMapped::kYes) {
-            proxy->priv().peekTexture()->texturePriv().markMipMapsDirty();
-        }
-    }
-#endif
     return sk_make_sp<SkImage_Gpu>(sk_ref_sp(ctx), kNeedNewImageUniqueID, at, std::move(proxy),
                                    std::move(colorSpace), SkBudgeted::kNo);
 }
diff --git a/tests/GrMipMappedTest.cpp b/tests/GrMipMappedTest.cpp
index ee4838d2ce..4c93714401 100644
--- a/tests/GrMipMappedTest.cpp
+++ b/tests/GrMipMappedTest.cpp
@@ -87,13 +87,7 @@ DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GrWrappedMipMappedTest, reporter, ctxInfo) {
                 if (isRT) {
                     REPORTER_ASSERT(reporter, texture->texturePriv().mipMapsAreDirty());
                 } else {
-#if 1
-                    // This is temporarily checks that the new image DOES have dirty MIP levels. See
-                    // comment in SkImage_Gpu.cpp, new_wrapped_texture_common().
-                    REPORTER_ASSERT(reporter, texture->texturePriv().mipMapsAreDirty());
-#else
                     REPORTER_ASSERT(reporter, !texture->texturePriv().mipMapsAreDirty());
-#endif
                 }
             } else {
                 REPORTER_ASSERT(reporter, GrMipMapped::kNo == texture->texturePriv().mipMapped());