Remove GrRenderTarget member variable from SkGpuDevice

src/gpu/SkGpuDevice.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGpuDevice_DEFINED
 #define SkGpuDevice_DEFINED
 
@@ skipping 67 matching lines @@
 
     // set all pixels to 0
     void clearAll();
 
     void replaceDrawContext(bool shouldRetainContent);
 
     GrDrawContext* accessDrawContext() override;
 
     SkImageInfo imageInfo() const override {
         SkColorType colorType;
-        if (!GrPixelConfigToColorType(fRenderTarget->config(), &colorType)) {
+        if (!GrPixelConfigToColorType(fDrawContext->config(), &colorType)) {
             colorType = kUnknown_SkColorType;
         }
         return SkImageInfo::Make(fSize.fWidth, fSize.fHeight, colorType,
                                  fOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType,
                                  sk_ref_sp(fDrawContext->getColorSpace()));
     }
 
     void drawPaint(const SkDraw&, const SkPaint& paint) override;
     virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
                             const SkPoint[], const SkPaint& paint) override;
@@ skipping 52 matching lines @@
 
     // for debugging purposes only
     void drawTexture(GrTexture*, const SkRect& dst, const SkPaint&);
 
 protected:
     bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) override;
     bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) override;
     bool onShouldDisableLCD(const SkPaint&) const final;
 
 private:
-    // We want these unreffed in DrawContext, RenderTarget, GrContext order.
+    // We want these unreffed in DrawContext, GrContext order.
     SkAutoTUnref<GrContext>         fContext;
-    sk_sp<GrRenderTarget>           fRenderTarget;
     sk_sp<GrDrawContext>            fDrawContext;
 
     SkIPoint                        fClipOrigin;
     GrClipStackClip                 fClip;
     SkISize                         fSize;
     bool                            fOpaque;
 
     enum Flags {
         kNeedClear_Flag = 1 << 0,  //!< Surface requires an initial clear
         kIsOpaque_Flag  = 1 << 1,  //!< Hint from client that rendering to this device will be
@@ skipping 98 matching lines @@
                                                 int sampleCount,
                                                 GrSurfaceOrigin,
                                                 const SkSurfaceProps*);
 
     friend class GrAtlasTextContext;
     friend class SkSurface_Gpu;      // for access to surfaceProps
     typedef SkBaseDevice INHERITED;
 };
 
 #endif