Make fully lazy proxies possess an origin

Change-Id: Icd3d68bce78568562aa12167a58b6d6e5064b124
Reviewed-on: https://skia-review.googlesource.com/106901
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/ccpr/GrCCAtlas.cpp b/src/gpu/ccpr/GrCCAtlas.cpp
index 5ef39f8..97b28fb 100644
--- a/src/gpu/ccpr/GrCCAtlas.cpp
+++ b/src/gpu/ccpr/GrCCAtlas.cpp
@@ -138,6 +138,8 @@
     SkASSERT(!fTextureProxy);
 
     GrSurfaceDesc desc;
+    desc.fFlags = kRenderTarget_GrSurfaceFlag;
+    desc.fOrigin = kTopLeft_GrSurfaceOrigin;
     desc.fWidth = fWidth;
     desc.fHeight = fHeight;
     desc.fConfig = kAlpha_half_GrPixelConfig;