updateBackendTexture uses GrSurfaceContext to write pixmaps.

Bug: skia:11786

Change-Id: I1c70b7152a69b2bb976aec2ed1dc9d5f96cad7ab
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/348185
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index 6d822cd..8aec8f3 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -820,7 +820,8 @@
                                           GrColorType srcColorType,
                                           GrColorType dstColorType,
                                           const GrMipLevel levels[],
-                                          int levelCount) {
+                                          int levelCount,
+                                          bool prepForSampling) {
     SkDEBUGCODE(this->validate());
     SkASSERT(fContext);
 
@@ -842,7 +843,8 @@
                                                                   srcColorType,
                                                                   dstColorType,
                                                                   levels,
-                                                                  levelCount));
+                                                                  levelCount,
+                                                                  prepForSampling));
     if (!task) {
         return false;
     }