Revert of Retract GrRenderTarget a bit within SkGpuDevice

include/gpu/GrDrawContext.h

Index: include/gpu/GrDrawContext.h
diff --git a/include/gpu/GrDrawContext.h b/include/gpu/GrDrawContext.h
index 699bf49a2a5cd90ae2a820d9638e8171a23cc834..7bb9aafc78127252680ee0c88ead0ac79617ae5a 100644
--- a/include/gpu/GrDrawContext.h
+++ b/include/gpu/GrDrawContext.h
@@ -273,7 +273,6 @@
      */
     void drawPathBatch(const GrPipelineBuilder&, GrDrawPathBatchBase*);
 
-    const GrSurfaceDesc& desc() const { return fRenderTarget->desc(); }
     int width() const { return fRenderTarget->width(); }
     int height() const { return fRenderTarget->height(); }
     int numColorSamples() const { return fRenderTarget->numColorSamples(); }