Do not add Resource for SubstituteData to MemoryCache

third_party/WebKit/Source/core/fetch/MemoryCache.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 Apple Inc. 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.
@@ skipping 651 matching lines @@
         }
     }
 
     if (m_prunePending && m_deadSize > m_maxDeferredPruneDeadCapacity && justReleasedResource) {
         // The following eviction does not respect LRU order, but it can be done
         // immediately in constant time, as opposed to pruneDeadResources, which
         // we would rather defer because it is O(N), which would make tear-down of N
         // objects O(N^2) if we pruned immediately. This immediate eviction is a
         // safeguard against runaway memory consumption by dead resources
         // while a prune is pending.
-        // Main Resources in the cache are only substitue data that was
-        // precached and should not be evicted.
-        if (justReleasedResource->getType() != Resource::MainResource) {
-            if (MemoryCacheEntry* entry = getEntryForResource(justReleasedResource))
-                evict(entry);
-        }
+        if (MemoryCacheEntry* entry = getEntryForResource(justReleasedResource))
+            evict(entry);
 
         // As a last resort, prune immediately
         if (m_deadSize > m_maxDeferredPruneDeadCapacity)
             pruneNow(currentTime, AutomaticPrune);
     }
 }
 
 void MemoryCache::willProcessTask()
 {
 }
@@ skipping 87 matching lines @@
                 printf("(%.1fK, %.1fK, %uA, %dR, %d); ", currentResource->decodedSize() / 1024.0f, (currentResource->encodedSize() + currentResource->overheadSize()) / 1024.0f, current->m_accessCount, currentResource->hasClients(), currentResource->isPurgeable());
 
             current = current->m_previousInAllResourcesList;
         }
     }
 }
 
 #endif // MEMORY_CACHE_STATS
 
 } // namespace blink