Do not show image placeholders for CSS sprites

third_party/WebKit/Source/core/css/CSSImageValue.h

Index: third_party/WebKit/Source/core/css/CSSImageValue.h
diff --git a/third_party/WebKit/Source/core/css/CSSImageValue.h b/third_party/WebKit/Source/core/css/CSSImageValue.h
index ccca36eac5440133a3bc1fca5122277c175202cc..f833ac16fc75ae663bb7da7eb99856e9d3cd93e7 100644
--- a/third_party/WebKit/Source/core/css/CSSImageValue.h
+++ b/third_party/WebKit/Source/core/css/CSSImageValue.h
@@ -24,6 +24,7 @@
 #include "core/CoreExport.h"
 #include "core/css/CSSValue.h"
 #include "platform/CrossOriginAttributeValue.h"
+#include "platform/loader/fetch/FetchParameters.h"
 #include "platform/weborigin/Referrer.h"
 #include "platform/wtf/RefPtr.h"
 
@@ -63,7 +64,9 @@ class CORE_EXPORT CSSImageValue : public CSSValue {
   }
   StyleImage* CacheImage(
       const Document&,
-      CrossOriginAttributeValue = kCrossOriginAttributeNotSet);
+      CrossOriginAttributeValue = kCrossOriginAttributeNotSet,
+      FetchParameters::PlaceholderImageRequestType =
+          FetchParameters::kDisallowPlaceholder);
 
   const String& Url() const { return absolute_url_; }