Turn ResourceLoaderSet into a part object.

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

Index: third_party/WebKit/Source/core/fetch/ResourceFetcher.h
diff --git a/third_party/WebKit/Source/core/fetch/ResourceFetcher.h b/third_party/WebKit/Source/core/fetch/ResourceFetcher.h
index 5347ba88ce67dfa3389edcb910ea45a1d696591c..1e970d19b2f3f8a2fe2f2b0af66db06ea55aaea4 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceFetcher.h
+++ b/third_party/WebKit/Source/core/fetch/ResourceFetcher.h
@@ -33,6 +33,7 @@
 #include "core/fetch/FetchRequest.h"
 #include "core/fetch/Resource.h"
 #include "core/fetch/ResourceLoaderOptions.h"
+#include "core/fetch/ResourceLoaderSet.h"
 #include "core/fetch/SubstituteData.h"
 #include "platform/Timer.h"
 #include "platform/network/ResourceError.h"
@@ -55,7 +56,6 @@ class ScriptResource;
 class XSLStyleSheetResource;
 class KURL;
 class ResourceTimingInfo;
-class ResourceLoaderSet;
 
 // The ResourceFetcher provides a per-context interface to the MemoryCache
 // and enforces a bunch of security checks and rules for resource revalidation.
@@ -193,8 +193,8 @@ private:
 
     Vector<OwnPtr<ResourceTimingInfo>> m_scheduledResourceTimingReports;
 
-    Member<ResourceLoaderSet> m_loaders;
-    Member<ResourceLoaderSet> m_nonBlockingLoaders;
+    ResourceLoaderSet m_loaders;
+    ResourceLoaderSet m_nonBlockingLoaders;
 
     // Used in hit rate histograms.
     class DeadResourceStatsRecorder {