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 7430add542470715679d9b26a7bf15ee4602e534..f66c1009148ad16533834a31eaf9a6859b8570c7 100644
--- a/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
+++ b/third_party/WebKit/Source/core/css/CSSImageSetValue.cpp
@@ -97,10 +97,10 @@ StyleImage* CSSImageSetValue::cachedImage(float deviceScaleFactor) const {
   return m_cachedImage.get();
 }
 
-StyleImage* CSSImageSetValue::cacheImage(
-    const Document& document,
-    float deviceScaleFactor,
-    CrossOriginAttributeValue crossOrigin) {
+StyleImage* CSSImageSetValue::cacheImage(const Document& document,
+                                         float deviceScaleFactor,
+                                         CrossOriginAttributeValue crossOrigin,
+                                         bool allowImagePlaceholder) {
   if (!m_imagesInSet.size())
     fillImageSet();
 
@@ -117,7 +117,9 @@ StyleImage* CSSImageSetValue::cacheImage(
     if (crossOrigin != CrossOriginAttributeNotSet)
       request.setCrossOriginAccessControl(document.getSecurityOrigin(),
                                           crossOrigin);
-    if (document.settings() && document.settings()->getFetchImagePlaceholders())
+    if (document.settings() &&
+        document.settings()->getFetchImagePlaceholders() &&
+        allowImagePlaceholder)
       request.setAllowImagePlaceholder();
 
     if (ImageResourceContent* cachedImage =