Do not show image placeholders for CSS sprites

third_party/WebKit/Source/core/css/CSSImageSetValue.cpp

Index: third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp b/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
index 565dc731ca01b008f9e4a150ed3134150d6c9933..08fe561adff445c14d15d9de51d490b453e1f4cc 100644
--- a/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
@@ -101,6 +101,7 @@ StyleImage* CSSImageSetValue::CachedImage(float device_scale_factor) const {
 StyleImage* CSSImageSetValue::CacheImage(
     const Document& document,
     float device_scale_factor,
+    FetchParameters::PlaceholderImageRequestType placeholder_image_request_type,
     CrossOriginAttributeValue cross_origin) {
   if (!images_in_set_.size())
     FillImageSet();
@@ -122,7 +123,8 @@ StyleImage* CSSImageSetValue::CacheImage(
                                          cross_origin);
     }
 
-    if (document.GetFrame())
+    if (document.GetFrame() &&
+        placeholder_image_request_type == FetchParameters::kAllowPlaceholder)
       document.GetFrame()->MaybeAllowImagePlaceholder(params);
 
     if (ImageResourceContent* cached_image =