Do not add a Resource with DoNotBufferData policy to the memory cache

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 8c5fbea3b7acbaf24b5ff48310298d3fbbfb94ed..9713e4ab261e94ba38788bb0533eca38e912b11a 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.cpp
@@ -744,9 +744,12 @@ Resource* ResourceFetcher::createResourceForLoading(
   }
   resource->setCacheIdentifier(cacheIdentifier);
 
-  // Don't add main resource to cache to prevent reuse.
-  if (factory.type() != Resource::MainResource)
+  // - Don't add main resource to cache to prevent reuse.
+  // - Don't add the resource if its body will not be stored.
+  if (factory.type() != Resource::MainResource &&
+      request.options().dataBufferingPolicy != DoNotBufferData) {
     memoryCache()->add(resource);
+  }
   return resource;
 }