Make asDirectContext return a GrDirectContext

Change-Id: I373658d68582adc9728f3a75d84178a365f5b798
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/299877
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Adlai Holler <adlai@google.com>
diff --git a/src/gpu/GrBaseContextPriv.h b/src/gpu/GrBaseContextPriv.h
index e564347..8a08d7a 100644
--- a/src/gpu/GrBaseContextPriv.h
+++ b/src/gpu/GrBaseContextPriv.h
@@ -27,7 +27,7 @@
 
     GrImageContext* asImageContext() { return fContext->asImageContext(); }
     GrRecordingContext* asRecordingContext() { return fContext->asRecordingContext(); }
-    GrContext* asDirectContext() { return fContext->asDirectContext(); }
+    GrDirectContext* asDirectContext() { return fContext->asDirectContext(); }
 
     GrContextOptions::ShaderErrorHandler* getShaderErrorHandler() const;