Don't cache any SkBitmaps in DeferredImageDecoder

Source/core/fetch/ImageResource.cpp

Index: Source/core/fetch/ImageResource.cpp
diff --git a/Source/core/fetch/ImageResource.cpp b/Source/core/fetch/ImageResource.cpp
index ceb0fda299dde70f5d5c03f703daef7e4f03f1e5..58d05a06429d25492c2109039d2d4155d3bc0b03 100644
--- a/Source/core/fetch/ImageResource.cpp
+++ b/Source/core/fetch/ImageResource.cpp
@@ -390,18 +390,6 @@ void ImageResource::updateImage(bool allDataReceived)
     }
 }
 
-void ImageResource::updateBitmapImages(HashSet<ImageResource*>& images, bool redecodeImages)
-{
-    for (ImageResource* imageResource : images) {
-        if (!imageResource->hasImage() || imageResource->image()->isNull())
-            continue;
-        BitmapImage* image = toBitmapImage(imageResource->image());
-        if (redecodeImages)
-            image->resetDecoder();
-        imageResource->updateImage(image->isAllDataReceived());
-    }
-}
-
 void ImageResource::finishOnePart()
 {
     if (m_loadingMultipartContent)