Don't cache any SkBitmaps in DeferredImageDecoder

Source/core/fetch/ImageResourceTest.cpp

Index: Source/core/fetch/ImageResourceTest.cpp
diff --git a/Source/core/fetch/ImageResourceTest.cpp b/Source/core/fetch/ImageResourceTest.cpp
index 86b89e267ec35996cd9747b2d847baf56c5b8444..69234fa250c57f6f0fcf2f7203d76652a4f133eb 100644
--- a/Source/core/fetch/ImageResourceTest.cpp
+++ b/Source/core/fetch/ImageResourceTest.cpp
@@ -219,12 +219,6 @@ TEST(ImageResourceTest, UpdateBitmapImages)
     HashSet<ImageResource*> bitmapImages;
     ASSERT_TRUE(cachedImage->image()->isBitmapImage());
     bitmapImages.add(cachedImage.get());
-
-    // Updating bitmap resources produces image changed callbacks on their clients.
-    ImageResource::updateBitmapImages(bitmapImages);
-    ASSERT_EQ(client.imageChangedCount(), 2);
-    ImageResource::updateBitmapImages(bitmapImages, true);
-    ASSERT_EQ(client.imageChangedCount(), 3);
 }
 
 } // namespace