Revert of Cancel image loads if decoding failed.

third_party/WebKit/Source/platform/graphics/ImageSource.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
  * Copyright (C) 2008, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 33 matching lines @@
 size_t ImageSource::clearCacheExceptFrame(size_t clearExceptFrame)
 {
     return m_decoder ? m_decoder->clearCacheExceptFrame(clearExceptFrame) : 0;
 }
 
 PassRefPtr<SharedBuffer> ImageSource::data()
 {
     return m_decoder ? m_decoder->data() : nullptr;
 }
 
-ImageDecoder::SniffResult ImageSource::setData(SharedBuffer& data, bool allDataReceived)
+void ImageSource::setData(SharedBuffer& data, bool allDataReceived)
 {
-    ImageDecoder::SniffResult result = ImageDecoder::determineImageType(data);
+    // Create a decoder by sniffing the encoded data. If insufficient data bytes are available to
+    // determine the encoded image type, no decoder is created.
     if (!m_decoder)
-        m_decoder = DeferredImageDecoder::create(result, ImageDecoder::AlphaPremultiplied, ImageDecoder::GammaAndColorProfileApplied);
+        m_decoder = DeferredImageDecoder::create(data, ImageDecoder::AlphaPremultiplied, ImageDecoder::GammaAndColorProfileApplied);
 
     if (m_decoder)
         m_decoder->setData(data, allDataReceived);
-
-    return result;
 }
 
 String ImageSource::filenameExtension() const
 {
     return m_decoder ? m_decoder->filenameExtension() : String();
 }
 
 bool ImageSource::isSizeAvailable()
 {
     return m_decoder && m_decoder->isSizeAvailable();
@@ skipping 73 matching lines @@
 {
     return m_decoder && m_decoder->frameIsCompleteAtIndex(index);
 }
 
 size_t ImageSource::frameBytesAtIndex(size_t index) const
 {
     return m_decoder ? m_decoder->frameBytesAtIndex(index) : 0;
 }
 
 } // namespace blink