Updated ownership of NavigationItems within CRWSessionController.

ios/web/navigation/crw_session_entry_unittest.mm

Index: ios/web/navigation/crw_session_entry_unittest.mm
diff --git a/ios/web/navigation/crw_session_entry_unittest.mm b/ios/web/navigation/crw_session_entry_unittest.mm
index aae10d0d65f376f7e3bab5fb9d5fffa01adb08f2..2fe6708fb3e79306dcb7d87b16bdf17b54194379 100644
--- a/ios/web/navigation/crw_session_entry_unittest.mm
+++ b/ios/web/navigation/crw_session_entry_unittest.mm
@@ -33,18 +33,18 @@ void SetUp() override {
     GURL url("http://init.test");
     ui::PageTransition transition =
         ui::PAGE_TRANSITION_AUTO_BOOKMARK;
-    std::unique_ptr<web::NavigationItemImpl> item(
-        new web::NavigationItemImpl());
-    item->SetOriginalRequestURL(url);
-    item->SetURL(url);
-    item->SetTransitionType(transition);
-    item->SetTimestamp(base::Time::Now());
-    item->SetPostData([@"Test data" dataUsingEncoding:NSUTF8StringEncoding]);
+    _item.reset(new web::NavigationItemImpl());
+    _item->SetOriginalRequestURL(url);
+    _item->SetURL(url);
+    _item->SetTransitionType(transition);
+    _item->SetTimestamp(base::Time::Now());
+    _item->SetPostData([@"Test data" dataUsingEncoding:NSUTF8StringEncoding]);
     _sessionEntry.reset(
-        [[CRWSessionEntry alloc] initWithNavigationItem:std::move(item)]);
+        [[CRWSessionEntry alloc] initWithNavigationItem:_item.get()]);
   }
 
  protected:
+  std::unique_ptr<web::NavigationItemImpl> _item;
   base::scoped_nsobject<CRWSessionEntry> _sessionEntry;
 };