ImageDocumentParser should stop sending data to ImageResource once decoding fails.

third_party/WebKit/Source/core/html/ImageDocument.cpp

Index: third_party/WebKit/Source/core/html/ImageDocument.cpp
diff --git a/third_party/WebKit/Source/core/html/ImageDocument.cpp b/third_party/WebKit/Source/core/html/ImageDocument.cpp
index d3fb21bb4965fa5cbc3f17601c632912be9995ae..5c50aa5383bd903121dc2e122f80a85bd5a56c45 100644
--- a/third_party/WebKit/Source/core/html/ImageDocument.cpp
+++ b/third_party/WebKit/Source/core/html/ImageDocument.cpp
@@ -144,7 +144,9 @@ void ImageDocumentParser::appendBytes(const char* data, size_t length)
 
     if (document()->cachedImage()) {
         RELEASE_ASSERT(length <= std::numeric_limits<unsigned>::max());
-        document()->cachedImage()->appendData(data, length);
+        // If decoding has already failed, there's no point in sending additional data to the ImageResource.
+        if (document()->cachedImage()->getStatus() != Resource::DecodeError)
+            document()->cachedImage()->appendData(data, length);
     }
 
     if (!isDetached())