remove unused SkAutoROCanvasPixels

src/core/SkCanvas.cpp

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkCanvasPriv.h"
@@ skipping 1377 matching lines @@
         *origin = this->getTopDevice(false)->getOrigin();
     }
     return pmap.writable_addr();
 }
 
 bool SkCanvas::onAccessTopLayerPixels(SkPixmap* pmap) {
     SkBaseDevice* dev = this->getTopDevice();
     return dev && dev->accessPixels(pmap);
 }
 
-SkAutoROCanvasPixels::SkAutoROCanvasPixels(SkCanvas* canvas) {
-    fAddr = canvas->peekPixels(&fInfo, &fRowBytes);
-    if (nullptr == fAddr) {
-        fInfo = canvas->imageInfo();
-        if (kUnknown_SkColorType == fInfo.colorType() || !fBitmap.tryAllocPixels(fInfo)) {
-            return; // failure, fAddr is nullptr
-        }
-        if (!canvas->readPixels(&fBitmap, 0, 0)) {
-            return; // failure, fAddr is nullptr
-        }
-        fAddr = fBitmap.getPixels();
-        fRowBytes = fBitmap.rowBytes();
-    }
-    SkASSERT(fAddr);    // success
-}
-
-bool SkAutoROCanvasPixels::asROBitmap(SkBitmap* bitmap) const {
-    if (fAddr) {
-        return bitmap->installPixels(fInfo, const_cast<void*>(fAddr), fRowBytes);
-    } else {
-        bitmap->reset();
-        return false;
-    }
-}
-
 /////////////////////////////////////////////////////////////////////////////
 
 void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y,
                                   const SkPaint* paint, bool deviceIsBitmapDevice) {
     SkPaint tmp;
     if (nullptr == paint) {
         paint = &tmp;
     }
 
     LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type)
@@ skipping 1602 matching lines @@
     }
 
     if (matrix) {
         canvas->concat(*matrix);
     }
 }
 
 SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() {
     fCanvas->restoreToCount(fSaveCount);
 }