1 files changed, 4 insertions, 1 deletions
diff --git a/chromium/third_party/WebKit/Source/web/PrerendererClientImpl.h b/chromium/third_party/WebKit/Source/web/PrerendererClientImpl.h
index 8f3f7c5652e..3487fba27e9 100644
--- a/chromium/third_party/WebKit/Source/web/PrerendererClientImpl.h
+++ b/chromium/third_party/WebKit/Source/web/PrerendererClientImpl.h
@@ -44,13 +44,16 @@ namespace blink {
 
 class WebPrerendererClient;
 
-class PrerendererClientImpl : public WebCore::PrerendererClient {
+class PrerendererClientImpl FINAL : public NoBaseWillBeGarbageCollected<PrerendererClientImpl>, public WebCore::PrerendererClient {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PrerendererClientImpl);
     WTF_MAKE_NONCOPYABLE(PrerendererClientImpl);
 public:
     explicit PrerendererClientImpl(WebPrerendererClient*);
 
     void willAddPrerender(WebCore::Prerender*) OVERRIDE;
 
+    virtual void trace(WebCore::Visitor* visitor) OVERRIDE { WebCore::PrerendererClient::trace(visitor); }
+
 private:
     WebPrerendererClient* m_client;
 };