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 f406305202bb29305f6ef789edd56f91e45e934e..8dd729544c5e4dbe2f3fd3e1148adb79cc29d0c2 100644
--- a/third_party/WebKit/Source/core/css/CSSImageValue.h
+++ b/third_party/WebKit/Source/core/css/CSSImageValue.h
@@ -61,9 +61,9 @@ class CORE_EXPORT CSSImageValue : public CSSValue {
     ASSERT(!isCachePending());
     return m_cachedImage.get();
   }
-  StyleImage* cacheImage(
-      const Document&,
-      CrossOriginAttributeValue = CrossOriginAttributeNotSet);
+  StyleImage* cacheImage(const Document&,
+                         CrossOriginAttributeValue = CrossOriginAttributeNotSet,
+                         bool allowImagePlaceholder = false);
 
   const String& url() const { return m_absoluteURL; }