remove call to deprecated preroll() -- cc manages triggering/caching decodes

third_party/WebKit/Source/core/frame/ImageBitmap.cpp

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/ImageBitmap.h"
 
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/ImageData.h"
 #include "core/offscreencanvas/OffscreenCanvas.h"
@@ skipping 488 matching lines @@
       applyColorSpaceConversion(croppedSkImage, parsedOptions);
     if (parsedOptions.flipY) {
       return StaticBitmapImage::create(flipSkImageVertically(
           croppedSkImage.get(), DontEnforceAlphaPremultiply, parsedOptions));
     }
     // Special case: The first parameter image is unpremul but we need to turn
     // it into premul.
     if (parsedOptions.premultiplyAlpha && imageFormat == DontPremultiplyAlpha)
       return StaticBitmapImage::create(
           unPremulSkImageToPremul(croppedSkImage.get()));
-    // Call preroll to trigger image decoding.
-    croppedSkImage->preroll();
     return StaticBitmapImage::create(std::move(croppedSkImage));
   }
 
   sk_sp<SkSurface> surface = SkSurface::MakeRasterN32Premul(
       parsedOptions.resizeWidth, parsedOptions.resizeHeight);
   if (!surface)
     return nullptr;
   if (srcRect.isEmpty())
     return StaticBitmapImage::create(surface->makeImageSnapshot());
 
@@ skipping 580 matching lines @@
 void ImageBitmap::adjustDrawRects(FloatRect* srcRect,
                                   FloatRect* dstRect) const {}
 
 FloatSize ImageBitmap::elementSize(const FloatSize&) const {
   return FloatSize(width(), height());
 }
 
 DEFINE_TRACE(ImageBitmap) {}
 
 }  // namespace blink