Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/page/NetworkStateNotifier.h

Index: third_party/WebKit/Source/core/page/NetworkStateNotifier.h
diff --git a/third_party/WebKit/Source/core/page/NetworkStateNotifier.h b/third_party/WebKit/Source/core/page/NetworkStateNotifier.h
index f25348326696b0878417f9c196ede217120dfa30..955284c0e787a5380c9532b830581c411ce6e658 100644
--- a/third_party/WebKit/Source/core/page/NetworkStateNotifier.h
+++ b/third_party/WebKit/Source/core/page/NetworkStateNotifier.h
@@ -34,7 +34,6 @@
 #include "wtf/Noncopyable.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/Vector.h"
-#include <memory>
 
 namespace blink {
 
@@ -143,7 +142,7 @@ private:
     // The ObserverListMap is cross-thread accessed, adding/removing Observers running
     // within an ExecutionContext. Kept off-heap to ease cross-thread allocation and use;
     // the observers are (already) responsible for explicitly unregistering while finalizing.
-    using ObserverListMap = HashMap<UntracedMember<ExecutionContext>, std::unique_ptr<ObserverList>>;
+    using ObserverListMap = HashMap<UntracedMember<ExecutionContext>, OwnPtr<ObserverList>>;
 
     void notifyObserversOfConnectionChangeOnContext(WebConnectionType, double maxBandwidthMbps, ExecutionContext*);