Move resourceProvider accessor to GrContextPriv (take 2)

TBR=bsalomon@google.com
Change-Id: I3fd46ebfad0d04b8a2bfa6190f81308f3a6be620
Reviewed-on: https://skia-review.googlesource.com/95121
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrRenderTargetContext.cpp b/src/gpu/GrRenderTargetContext.cpp
index 19540eb..42a4fdd 100644
--- a/src/gpu/GrRenderTargetContext.cpp
+++ b/src/gpu/GrRenderTargetContext.cpp
@@ -1425,9 +1425,11 @@
         return false;
     }
 
+    auto resourceProvider = fContext->contextPriv().resourceProvider();
+
     SkTArray<sk_sp<GrSemaphore>> semaphores(numSemaphores);
     for (int i = 0; i < numSemaphores; ++i) {
-        sk_sp<GrSemaphore> sema = fContext->resourceProvider()->wrapBackendSemaphore(
+        sk_sp<GrSemaphore> sema = resourceProvider->wrapBackendSemaphore(
                 waitSemaphores[i], GrResourceProvider::SemaphoreWrapType::kWillWait,
                 kAdopt_GrWrapOwnership);
         std::unique_ptr<GrOp> waitOp(GrSemaphoreOp::MakeWait(sema, fRenderTargetProxy.get()));