Merge 147392 "Simply GIFImageReader error handling"

Source/WebCore/platform/image-decoders/gif/GIFImageReader.cpp

Index: Source/WebCore/platform/image-decoders/gif/GIFImageReader.cpp
===================================================================
--- Source/WebCore/platform/image-decoders/gif/GIFImageReader.cpp	(revision 147572)
+++ Source/WebCore/platform/image-decoders/gif/GIFImageReader.cpp	(working copy)
@@ -358,10 +358,8 @@
 {
     ASSERT(m_bytesRead <= m_data->size());
 
-    if (!m_parseFailed && !parse(m_bytesRead, m_data->size() - m_bytesRead, query == GIFImageDecoder::GIFSizeQuery)) {
-        m_parseFailed = true;
+    if (!parse(m_bytesRead, m_data->size() - m_bytesRead, query == GIFImageDecoder::GIFSizeQuery))
         return false;
-    }
 
     if (query != GIFImageDecoder::GIFFullQuery)
         return true;