Add GPUSink getters to suppress unused field warnings in no gpu build.

Change-Id: Iab66cf3a8fd1d3008f62d832cdb7f9a65b2077f7
Reviewed-on: https://skia-review.googlesource.com/113420
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/dm/DMSrcSink.h b/dm/DMSrcSink.h
index 18e854b..87495a1 100644
--- a/dm/DMSrcSink.h
+++ b/dm/DMSrcSink.h
@@ -336,7 +336,6 @@
     SinkFlags flags() const override { return SinkFlags{ SinkFlags::kNull, SinkFlags::kDirect }; }
 };
 
-
 class GPUSink : public Sink {
 public:
     GPUSink(sk_gpu_test::GrContextFactory::ContextType,
@@ -349,6 +348,12 @@
     Error onDraw(const Src&, SkBitmap*, SkWStream*, SkString*,
                  const GrContextOptions& baseOptions) const;
 
+    sk_gpu_test::GrContextFactory::ContextType contextType() const { return fContextType; }
+    const sk_gpu_test::GrContextFactory::ContextOverrides& contextOverrides() {
+        return fContextOverrides;
+    }
+    SkCommandLineConfigGpu::SurfType surfType() const { return fSurfType; }
+    bool useDIText() const { return fUseDIText; }
     bool serial() const override { return !fThreaded; }
     const char* fileExtension() const override { return "png"; }
     SinkFlags flags() const override {