Use copyToVector in ScopedPageLoadDeferrer.

third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp

Index: third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp
diff --git a/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp b/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp
index bedf6765e1a1a15cde093789c0e290078ce79a03..86576aad5ce6935e544caa0db0812559899d9e53 100644
--- a/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp
+++ b/third_party/WebKit/Source/core/page/ScopedPageLoadDeferrer.cpp
@@ -40,8 +40,7 @@ void setDefersLoading(bool isDeferred)
     // Make a copy of the collection. Undeferring loads can cause script to run,
     // which would mutate ordinaryPages() in the middle of iteration.
     HeapVector<Member<Page>> pages;
-    for (const auto& page : Page::ordinaryPages())
-        pages.append(page);
+    copyToVector(Page::ordinaryPages(), pages);
     for (const auto& page : pages)
         page->setDefersLoading(isDeferred);
 }