Remove sample count from GrSurfaceDesc.

This leaves just width, height, and GrPixelConfig. Once we remove the
latter we can replace GrSurfaceDesc with SkISize.

Also remove unused GrRenderTarget::overrideResolveRect

Also remove GrSurfaceProxy::Renderable and use GrRenderable instead.

Change-Id: I652fe6169a22ca33d199b144ec6385286ac07b5a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228570
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 6ec45d8..cfb2922 100644
--- a/src/gpu/GrSurfaceContext.cpp
+++ b/src/gpu/GrSurfaceContext.cpp
@@ -280,7 +280,6 @@
         GrSurfaceDesc desc;
         desc.fWidth = srcInfo.width();
         desc.fHeight = srcInfo.height();
-        desc.fSampleCnt = 1;
         GrColorType colorType;
 
         GrBackendFormat format;
@@ -308,7 +307,7 @@
         GrSurfaceOrigin tempOrigin =
                 this->asRenderTargetContext() ? kTopLeft_GrSurfaceOrigin : dstProxy->origin();
         auto tempProxy = direct->priv().proxyProvider()->createProxy(
-                format, desc, GrRenderable::kNo, tempOrigin, SkBackingFit::kApprox,
+                format, desc, GrRenderable::kNo, 1, tempOrigin, SkBackingFit::kApprox,
                 SkBudgeted::kYes, GrProtected::kNo);
 
         if (!tempProxy) {