Creating functions for uploading a mipmapped texture.

BUG=476416
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1249543003

Review URL: https://codereview.chromium.org/1249543003
diff --git a/src/gpu/effects/GrConfigConversionEffect.cpp b/src/gpu/effects/GrConfigConversionEffect.cpp
index 2725e56..dc41203 100644
--- a/src/gpu/effects/GrConfigConversionEffect.cpp
+++ b/src/gpu/effects/GrConfigConversionEffect.cpp
@@ -175,6 +175,7 @@
     desc.fWidth = 256;
     desc.fHeight = 256;
     desc.fConfig = kRGBA_8888_GrPixelConfig;
+    desc.fIsMipMapped = false;
 
     SkAutoTUnref<GrTexture> readTex(context->textureProvider()->createTexture(
         desc, SkBudgeted::kYes, nullptr, 0));