Make CSSPreloaderResourceClient hold weak references to its resource

third_party/WebKit/Source/core/html/parser/CSSPreloadScanner.h

Index: third_party/WebKit/Source/core/html/parser/CSSPreloadScanner.h
diff --git a/third_party/WebKit/Source/core/html/parser/CSSPreloadScanner.h b/third_party/WebKit/Source/core/html/parser/CSSPreloadScanner.h
index 7dbcff6c830d96b02a12e96dd0e0fec2070eef29..9cb8670c0c976d9ffc6579a3997bf62be6420ce6 100644
--- a/third_party/WebKit/Source/core/html/parser/CSSPreloadScanner.h
+++ b/third_party/WebKit/Source/core/html/parser/CSSPreloadScanner.h
@@ -101,7 +101,7 @@ class CSSPreloadScanner {
 // @import tags before parsing.
 class CORE_EXPORT CSSPreloaderResourceClient
     : public GarbageCollectedFinalized<CSSPreloaderResourceClient>,
-      public ResourceOwner<CSSStyleSheetResource, StyleSheetResourceClient> {
+      public StyleSheetResourceClient {
   USING_GARBAGE_COLLECTED_MIXIN(CSSPreloaderResourceClient);
 
  public:
@@ -123,6 +123,7 @@ class CORE_EXPORT CSSPreloaderResourceClient
 
  private:
   void scanCSS(const CSSStyleSheetResource*);
+  void clearResource();
 
   enum PreloadPolicy {
     ScanOnly,
@@ -131,6 +132,7 @@ class CORE_EXPORT CSSPreloaderResourceClient
 
   const PreloadPolicy m_policy;
   WeakMember<HTMLResourcePreloader> m_preloader;
+  WeakMember<CSSStyleSheetResource> m_resource;
 };
 
 }  // namespace blink