use new readPixels, as old version using Config8888 is deprecated

Source/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 282 matching lines @@
 
 template <Multiply multiplied>
 PassRefPtr<Uint8ClampedArray> getImageData(const IntRect& rect, GraphicsContext* context, const IntSize& size)
 {
     float area = 4.0f * rect.width() * rect.height();
     if (area > static_cast<float>(std::numeric_limits<int>::max()))
         return nullptr;
 
     RefPtr<Uint8ClampedArray> result = Uint8ClampedArray::createUninitialized(rect.width() * rect.height() * 4);
 
-    unsigned char* data = result->data();
-
     if (rect.x() < 0
         || rect.y() < 0
         || rect.maxX() > size.width()
         || rect.maxY() > size.height())
         result->zeroFill();
 
-    unsigned destBytesPerRow = 4 * rect.width();
-    SkBitmap destBitmap;
-    destBitmap.installPixels(SkImageInfo::MakeN32Premul(rect.width(), rect.height()), data, destBytesPerRow);
+    SkAlphaType alphaType = (multiplied == Premultiplied) ? kPremul_SkAlphaType : kUnpremul_SkAlphaType;
+    SkImageInfo info = SkImageInfo::Make(rect.width(), rect.height(), kRGBA_8888_SkColorType, alphaType);
 
-    SkCanvas::Config8888 config8888;
-    if (multiplied == Premultiplied)
-        config8888 = SkCanvas::kRGBA_Premul_Config8888;
-    else
-        config8888 = SkCanvas::kRGBA_Unpremul_Config8888;
-
-    context->readPixels(&destBitmap, rect.x(), rect.y(), config8888);
+    context->readPixels(info, result->data(), 4 * rect.width(), rect.x(), rect.y());
     return result.release();
 }
 
 PassRefPtr<Uint8ClampedArray> ImageBuffer::getUnmultipliedImageData(const IntRect& rect) const
 {
     if (!isValid())
         return Uint8ClampedArray::create(rect.width() * rect.height() * 4);
     return getImageData<Unmultiplied>(rect, context(), m_surface->size());
 }
 
@@ skipping 81 matching lines @@
     if (!encodeImage(imageData, mimeType, quality, &encodedImage))
         return "data:,";
 
     Vector<char> base64Data;
     base64Encode(encodedImage, base64Data);
 
     return "data:" + mimeType + ";base64," + base64Data;
 }
 
 } // namespace WebCore