Do not show image placeholders for CSS sprites

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef CSSImageValue_h
 #define CSSImageValue_h
 
 #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"
 
 namespace blink {
 
 class Document;
 class KURL;
 class StyleImage;
 class LayoutObject;
 
@@ skipping 19 matching lines @@
   }
   ~CSSImageValue();
 
   bool IsCachePending() const { return !cached_image_; }
   StyleImage* CachedImage() const {
     DCHECK(!IsCachePending());
     return cached_image_.Get();
   }
   StyleImage* CacheImage(
       const Document&,
-      CrossOriginAttributeValue = kCrossOriginAttributeNotSet);
+      CrossOriginAttributeValue = kCrossOriginAttributeNotSet,
+      FetchParameters::PlaceholderImageRequestType =
+          FetchParameters::kDisallowPlaceholder);

[kouhei (in TOK), 2017/04/28 03:50:50]

same here.

[Raj, 2017/04/28 18:01:21]

Done.

 
   const String& Url() const { return absolute_url_; }
 
   const Referrer& GetReferrer() const { return referrer_; }
 
   void ReResolveURL(const Document&) const;
 
   String CustomCSSText() const;
 
   bool HasFailedOrCanceledSubresources() const;
@@ skipping 25 matching lines @@
   // Cached image data.
   mutable AtomicString absolute_url_;
   mutable Member<StyleImage> cached_image_;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageValue, IsImageValue());
 
 }  // namespace blink
 
 #endif  // CSSImageValue_h