Fix test surface

Author: Adlai-Holler

testing/test_gl_surface.cc

@@ -248,7 +248,7 @@ void* TestGLSurface::GetProcAddress(const char* name) const {
   return reinterpret_cast<void*>(symbol);
 }
 
-sk_sp<GrContext> TestGLSurface::GetGrContext() {
+sk_sp<GrDirectContext> TestGLSurface::GetGrContext() {
   if (context_) {
     return context_;
   }
@@ -258,7 +258,7 @@ sk_sp<GrContext> TestGLSurface::GetGrContext() {
   return context_;
 }
 
-sk_sp<GrContext> TestGLSurface::CreateGrContext() {
+sk_sp<GrDirectContext> TestGLSurface::CreateGrContext() {
   if (!MakeCurrent()) {
     return nullptr;
   }