Revert of Revert of Make drawImage a virtual on SkDevice

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 "SkImage_Gpu.h"
 #include "SkCanvas.h"
 #include "GrContext.h"
 
 SkImage_Gpu::SkImage_Gpu(const SkBitmap& bitmap, int sampleCountForNewSurfaces,
                          SkSurface::Budgeted budgeted)
     : INHERITED(bitmap.width(), bitmap.height(), NULL)
     , fBitmap(bitmap)
     , fSampleCountForNewSurfaces(sampleCountForNewSurfaces)
     , fBudgeted(budgeted)
 {
     SkASSERT(fBitmap.getTexture());
 }
 
 SkShader* SkImage_Gpu::onNewShader(SkShader::TileMode tileX,
                                    SkShader::TileMode tileY,
                                    const SkMatrix* localMatrix) const
 {
     return SkShader::CreateBitmapShader(fBitmap, tileX, tileY, localMatrix);
 }
 
-void SkImage_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const {
-    canvas->drawBitmap(fBitmap, x, y, paint);
-}
-
-void SkImage_Gpu::onDrawRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
-                                   const SkPaint* paint) const {
-    canvas->drawBitmapRectToRect(fBitmap, src, dst, paint);
-}
-
 SkSurface* SkImage_Gpu::onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props) const {
     GrContext* ctx = this->getTexture()->getContext();
     // TODO: Change signature of onNewSurface to take a budgeted param.
     static const SkSurface::Budgeted kBudgeted = SkSurface::kNo_Budgeted;
     return SkSurface::NewRenderTarget(ctx, kBudgeted, info, fSampleCountForNewSurfaces, &props);
 }
 
 GrTexture* SkImage_Gpu::onGetTexture() const {
     return fBitmap.getTexture();
 }
@@ skipping 16 matching lines @@
     return SkNEW_ARGS(SkImage_Gpu, (bitmap, sampleCountForNewSurfaces, budgeted));
 }
 
 GrTexture* SkTextureImageGetTexture(SkImage* image) {
     return ((SkImage_Gpu*)image)->getTexture();
 }
 
 extern void SkTextureImageApplyBudgetedDecision(SkImage* image) {
     ((SkImage_Gpu*)image)->applyBudgetDecision();
 }