Remove the use of OwnedPtrDeleter in WebMessagePortChannel.

third_party/WebKit/Source/platform/CrossThreadCopier.h

Index: third_party/WebKit/Source/platform/CrossThreadCopier.h
diff --git a/third_party/WebKit/Source/platform/CrossThreadCopier.h b/third_party/WebKit/Source/platform/CrossThreadCopier.h
index 863371ae5b1c04318b86a1245d925f2d33cc2910..6491d3fc24283addd5b3cd5f5778280ddf89ccc0 100644
--- a/third_party/WebKit/Source/platform/CrossThreadCopier.h
+++ b/third_party/WebKit/Source/platform/CrossThreadCopier.h
@@ -144,11 +144,11 @@ struct CrossThreadCopier<PassOwnPtr<T>> {
     }
 };
 
-template <typename T>
-struct CrossThreadCopier<std::unique_ptr<T>> {
+template <typename T, typename Deleter>
+struct CrossThreadCopier<std::unique_ptr<T, Deleter>> {
     STATIC_ONLY(CrossThreadCopier);
-    using Type = std::unique_ptr<T>;
-    static std::unique_ptr<T> copy(std::unique_ptr<T> pointer)
+    using Type = std::unique_ptr<T, Deleter>;
+    static std::unique_ptr<T, Deleter> copy(std::unique_ptr<T, Deleter> pointer)
     {
         return pointer; // This is in fact a move.
     }