Remove kRenderTarget_GrSurfaceFlag, instead pass GrRenderable.

This is the last surface desc flag, so remove flags from GrSurfaceDesc.

Bug: skia:6718

Change-Id: Id3ed66b161289927b62f40bfb1f6482cf544deda
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/227858
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrSWMaskHelper.cpp b/src/gpu/GrSWMaskHelper.cpp
index afd687a..505a215 100644
--- a/src/gpu/GrSWMaskHelper.cpp
+++ b/src/gpu/GrSWMaskHelper.cpp
@@ -107,6 +107,6 @@
         return nullptr;
     }
 
-    return context->priv().proxyProvider()->createTextureProxy(std::move(img), kNone_GrSurfaceFlags,
-                                                               1, SkBudgeted::kYes, fit);
+    return context->priv().proxyProvider()->createTextureProxy(std::move(img), GrRenderable::kNo, 1,
+                                                               SkBudgeted::kYes, fit);
 }