Remove min texture size support

src/image/SkImage_Gpu.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapCache.h"
 #include "SkImage_Gpu.h"
 #include "GrCaps.h"
@@ skipping 69 matching lines @@
 
 class Texture_GrTextureParamsAdjuster : public GrTextureParamsAdjuster {
 public:
     Texture_GrTextureParamsAdjuster(const SkImage* image, GrTexture* unstretched)
         : INHERITED(image->width(), image->height())
         , fImage(image)
         , fOriginal(unstretched)
     {}
 
 protected:
-    GrTexture* peekOriginalTexture() override { return fOriginal; }
-
     GrTexture* refOriginalTexture(GrContext* ctx) override {
         return SkRef(fOriginal);
     }
 
     void makeCopyKey(const CopyParams& copyParams, GrUniqueKey* copyKey) override {
         make_raw_texture_stretched_key(fImage->uniqueID(), copyParams, copyKey);
     }
 
     void didCacheCopy(const GrUniqueKey& copyKey) override {
         as_IB(fImage)->notifyAddedToCache();
     }
 
-    bool getROBitmap(SkBitmap* bitmap) override {
-        return as_IB(fImage)->getROPixels(bitmap);
-    }
-
 private:
     const SkImage*  fImage;
     GrTexture*      fOriginal;
 
     typedef GrTextureParamsAdjuster INHERITED;
 };
 
 GrTexture* SkImage_Gpu::asTextureRef(GrContext* ctx, const GrTextureParams& params) const {
     return Texture_GrTextureParamsAdjuster(this, fTexture).refTextureForParams(ctx, params);
 }
@@ skipping 287 matching lines @@
     if (!dst) {
         return nullptr;
     }
     
     const SkIRect srcR = SkIRect::MakeWH(desc.fWidth, desc.fHeight);
     const SkIPoint dstP = SkIPoint::Make(0, 0);
     ctx->copySurface(dst, src, srcR, dstP, GrContext::kFlushWrites_PixelOp);
     return dst;
 }