store info in basedevice, change getter to non-virtual const&

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 48 matching lines @@
 
     GrContext* context() const override { return fContext; }
 
     // set all pixels to 0
     void clearAll();
 
     void replaceDrawContext(bool shouldRetainContent);
 
     GrDrawContext* accessDrawContext() override;
 
-    SkImageInfo imageInfo() const override {
-        SkColorType 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;
     virtual void drawRect(const SkDraw&, const SkRect& r,
                           const SkPaint& paint) override;
     virtual void drawRRect(const SkDraw&, const SkRRect& r,
                            const SkPaint& paint) override;
     virtual void drawDRRect(const SkDraw& draw, const SkRRect& outer,
                             const SkRRect& inner, const SkPaint& paint) override;
     virtual void drawOval(const SkDraw&, const SkRect& oval,
@@ skipping 171 matching lines @@
                                                 int sampleCount,
                                                 GrSurfaceOrigin,
                                                 const SkSurfaceProps*);
 
     friend class GrAtlasTextContext;
     friend class SkSurface_Gpu;      // for access to surfaceProps
     typedef SkBaseDevice INHERITED;
 };
 
 #endif