Temporarily introduce ImageResourceInfo::setIsPlaceholder()

third_party/WebKit/Source/core/loader/resource/ImageResourceInfo.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ImageResourceInfo_h
 #define ImageResourceInfo_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/Heap.h"
@@ skipping 32 matching lines @@
   virtual bool isAccessAllowed(
       SecurityOrigin*,
       DoesCurrentFrameHaveSingleSecurityOrigin) const = 0;
   virtual bool hasCacheControlNoStoreHeader() const = 0;
   virtual const ResourceError& resourceError() const = 0;
 
   // Like Resource::error(), decodeError() makes corresponding ImageResource
   // (if any) DecodeError and finishes loading.
   virtual void decodeError(bool allDataReceived) = 0;
 
+  // TODO(hiroshige): Remove this.
+  virtual void setIsPlaceholder(bool) = 0;
+
   // TODO(hiroshige): Remove this once MemoryCache becomes further weaker.
   virtual void setDecodedSize(size_t) = 0;
 
   // TODO(hiroshige): Remove these.
   virtual void willAddClientOrObserver() = 0;
   virtual void didRemoveClientOrObserver() = 0;
 
   // TODO(hiroshige): Remove this. crbug.com/666214
   virtual void emulateLoadStartedForInspector(
       ResourceFetcher*,
       const KURL&,
       const AtomicString& initiatorName) = 0;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink
 
 #endif