Move StyleSheetResourceClient to Oilpan heap

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

Index: third_party/WebKit/Source/core/fetch/StyleSheetResourceClient.h
diff --git a/third_party/WebKit/Source/core/fetch/StyleSheetResourceClient.h b/third_party/WebKit/Source/core/fetch/StyleSheetResourceClient.h
index 9656bd0f3d1088657e1e3282abc9cec24f410430..a95d456f46acb7c712e3ee7f5c35ad6619123295 100644
--- a/third_party/WebKit/Source/core/fetch/StyleSheetResourceClient.h
+++ b/third_party/WebKit/Source/core/fetch/StyleSheetResourceClient.h
@@ -33,13 +33,15 @@
 namespace blink {
 class CSSStyleSheetResource;
 
-class StyleSheetResourceClient : public ResourceClient {
+class StyleSheetResourceClient : public GarbageCollectedMixin, public ResourceClient {
 public:
     ~StyleSheetResourceClient() override {}
     static bool isExpectedType(ResourceClient* client) { return client->getResourceClientType() == StyleSheetType; }
     ResourceClientType getResourceClientType() const final { return StyleSheetType; }
     virtual void setCSSStyleSheet(const String& /* href */, const KURL& /* baseURL */, const String& /* charset */, const CSSStyleSheetResource*) {}
     virtual void setXSLStyleSheet(const String& /* href */, const KURL& /* baseURL */, const String& /* sheet */) {}
+
+    DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 } // namespace blink