Add <link rel=preload> onload support for scripts and styles

third_party/WebKit/Source/core/loader/LinkLoader.h

Index: third_party/WebKit/Source/core/loader/LinkLoader.h
diff --git a/third_party/WebKit/Source/core/loader/LinkLoader.h b/third_party/WebKit/Source/core/loader/LinkLoader.h
index bb79b8e8c50ae8a597f7bd9d1f2f5628c183ff5a..40787caec059b2e9cb84abb48ad934eb3787e502 100644
--- a/third_party/WebKit/Source/core/loader/LinkLoader.h
+++ b/third_party/WebKit/Source/core/loader/LinkLoader.h
@@ -36,6 +36,7 @@
 #include "core/fetch/ResourceClient.h"
 #include "core/fetch/ResourceOwner.h"
 #include "core/loader/LinkLoaderClient.h"
+#include "core/loader/LinkPreloadResourceClients.h"
 #include "platform/CrossOriginAttributeValue.h"
 #include "platform/PrerenderClient.h"
 #include "platform/Timer.h"
@@ -66,11 +67,16 @@ public:
     void didSendLoadForPrerender() override;
     void didSendDOMContentLoadedForPrerender() override;
 
+    void triggerEvents(Resource*);
+
     void released();
     bool loadLink(const LinkRelAttribute&, CrossOriginAttributeValue, const String& type, const String& as, const KURL&, Document&, const NetworkHintsInterface&);
     enum CanLoadResources { LoadResources, DoNotLoadResources };
     static bool loadLinkFromHeader(const String& headerValue, Document*, const NetworkHintsInterface&, CanLoadResources);
     static Resource::Type getTypeFromAsAttribute(const String& as, Document*);
+    WeakPtr<LinkLoader> createWeakPtr() { return m_weakPtrFactory.createWeakPtr(); }
+    void setPreloadResourceClient(PassOwnPtr<LinkPreloadResourceClient> client) { m_linkPreloadResourceClient = client; }
+    LinkPreloadResourceClient* preloadResourceClient() { return m_linkPreloadResourceClient.get(); }
 
     DECLARE_TRACE();
 
@@ -84,6 +90,8 @@ private:
     Timer<LinkLoader> m_linkLoadingErrorTimer;
 
     OwnPtrWillBeMember<PrerenderHandle> m_prerender;
+    WeakPtrFactory<LinkLoader> m_weakPtrFactory;
+    OwnPtrWillBeMember<LinkPreloadResourceClient> m_linkPreloadResourceClient;
 };
 
 }