Do not add Resource for SubstituteData to MemoryCache

third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp

Index: third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
diff --git a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
index 8625e38192b69d9e95a3b2bc2312721cc125fd82..cb5d0197f91520ef8b88fb5b2797e74fefcdbd67 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
@@ -350,7 +350,10 @@ PassRefPtrWillBeRawPtr<Resource> ResourceFetcher::resourceForStaticData(const Fe
     resource->setIdentifier(createUniqueIdentifier());
     resource->setCacheIdentifier(cacheIdentifier);
     resource->finish();
-    memoryCache()->add(resource.get());
+
+    if (!substituteData.isValid())
+        memoryCache()->add(resource.get());

[Nate Chapin, 2016/03/01 17:51:42]

There is a special case related to substitue data in MemoryCache::prune. We
should probably delete that if SubstituteData will never be in the cache.

[hiroshige, 2016/03/02 01:06:39]

Done.

+
     return resource.release();
 }