Implement support for link type serviceworker in link elements.

third_party/WebKit/Source/core/html/LinkResource.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LinkResource_h
 #define LinkResource_h
 
+#include "core/CoreExport.h"
 #include "core/fetch/FetchRequest.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class HTMLLinkElement;
 class LocalFrame;
 
-class LinkResource : public NoBaseWillBeGarbageCollectedFinalized<LinkResource>  {
+class CORE_EXPORT LinkResource : public NoBaseWillBeGarbageCollectedFinalized<LinkResource>  {
     WTF_MAKE_NONCOPYABLE(LinkResource); USING_FAST_MALLOC_WILL_BE_REMOVED(LinkResource);
 public:
     enum LinkResourceType {
         Style,
         Import,
-        Manifest
+        Manifest,
+        Other
     };
 
     explicit LinkResource(HTMLLinkElement*);
     virtual ~LinkResource();
 
     bool shouldLoadResource() const;
     LocalFrame* loadingFrame() const;
 
     virtual LinkResourceType type() const = 0;
     virtual void process() = 0;
@@ skipping 19 matching lines @@
 
 private:
     RawPtrWillBeMember<HTMLLinkElement> m_owner;
     KURL m_url;
     AtomicString m_charset;
 };
 
 } // namespace blink
 
 #endif // LinkResource_h