Reload image bypassing the cache

Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     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
@@ skipping 719 matching lines @@
     // Certain requests (e.g., XHRs) might have manually set headers that require revalidation.
     // FIXME: In theory, this should be a Revalidate case. In practice, the MemoryCache revalidation path assumes a whole bunch
     // of things about how revalidation works that manual headers violate, so punt to Reload instead.
     if (request.isConditional())
         return Reload;
 
     // Don't reload resources while pasting.
     if (m_allowStaleResources)
         return Use;
 
+    if (request.cachePolicy() == ResourceRequestCachePolicy::ReloadBypassingCache)
+        return Reload;
+
     if (!fetchRequest.options().canReuseRequest(existingResource->options()))
         return Reload;
 
     // Always use preloads.
     if (existingResource->isPreloaded())
         return Use;
 
     // CachePolicyHistoryBuffer uses the cache no matter what.
     CachePolicy cachePolicy = context().cachePolicy();
     if (cachePolicy == CachePolicyHistoryBuffer)
@@ skipping 548 matching lines @@
     ResourceLoaderHost::trace(visitor);
 }
 
 ResourceFetcher* ResourceFetcher::toResourceFetcher(ResourceLoaderHost* host)
 {
     ASSERT(host->objectType() == ResourceLoaderHost::ResourceFetcherType);
     return static_cast<ResourceFetcher*>(host);
 }
 
 }