Cancel image loads if decoding failed.

third_party/WebKit/Source/platform/image-decoders/ImageDecoder.cpp

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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
@@ skipping 62 matching lines @@
 inline bool matchesCURSignature(const char* contents)
 {
     return !memcmp(contents, "\x00\x00\x02\x00", 4);
 }
 
 inline bool matchesBMPSignature(const char* contents)
 {
     return !memcmp(contents, "BM", 2);
 }
 
+size_t ImageDecoder::longestSignatureLength()
+{
+    const size_t longestSignatureLength = sizeof("RIFF????WEBPVP") - 1;
+    DCHECK_EQ(14u, longestSignatureLength);
+    return 14u;
+}
+
 std::unique_ptr<ImageDecoder> ImageDecoder::create(const char* contents, size_t length, AlphaOption alphaOption, GammaAndColorProfileOption colorOptions)
 {
-    const size_t longestSignatureLength = sizeof("RIFF????WEBPVP") - 1;
-    ASSERT(longestSignatureLength == 14);
-
-    if (length < longestSignatureLength)
+    if (length < longestSignatureLength())
         return nullptr;
 
     size_t maxDecodedBytes = Platform::current() ? Platform::current()->maxDecodedImageBytes() : noDecodedImageByteLimit;
 
     if (matchesJPEGSignature(contents))
         return wrapUnique(new JPEGImageDecoder(alphaOption, colorOptions, maxDecodedBytes));
 
     if (matchesPNGSignature(contents))
         return wrapUnique(new PNGImageDecoder(alphaOption, colorOptions, maxDecodedBytes));
 
@@ skipping 284 matching lines @@
 }
 
 bool ImageDecoder::hasColorProfile() const
 {
     return false;
 }
 
 #endif // USE(QCMSLIB)
 
 } // namespace blink