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/GrSurfaceContext.cpp b/src/gpu/GrSurfaceContext.cpp
index 94a3abe..6d24a73 100644
--- a/src/gpu/GrSurfaceContext.cpp
+++ b/src/gpu/GrSurfaceContext.cpp
@@ -308,7 +308,8 @@
         GrSurfaceOrigin tempOrigin =
                 this->asRenderTargetContext() ? kTopLeft_GrSurfaceOrigin : dstProxy->origin();
         auto tempProxy = direct->priv().proxyProvider()->createProxy(
-                format, desc, tempOrigin, SkBackingFit::kApprox, SkBudgeted::kYes);
+                format, desc, GrRenderable::kNo, tempOrigin, SkBackingFit::kApprox,
+                SkBudgeted::kYes);
 
         if (!tempProxy) {
             return false;