Fix WebRemoteFrame leak in WebFrameSwapTest.SwapParentShouldDetachChildren

Source/web/tests/WebFrameTest.cpp

Index: Source/web/tests/WebFrameTest.cpp
diff --git a/Source/web/tests/WebFrameTest.cpp b/Source/web/tests/WebFrameTest.cpp
index ba661fbf74cb7c544f5887d3c1d0db984493ee00..89296919c35920bda368b105adfa8ba7f5049dfb 100644
--- a/Source/web/tests/WebFrameTest.cpp
+++ b/Source/web/tests/WebFrameTest.cpp
@@ -7111,7 +7111,7 @@ TEST_F(WebFrameSwapTest, SwapParentShouldDetachChildren)
 
     // Create child frames in the target frame before testing the swap.
     FrameTestHelpers::TestWebRemoteFrameClient remoteFrameClient;
-    remoteFrame->createRemoteChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &remoteFrameClient);
+    WebRemoteFrame* childRemoteFrame = remoteFrame->createRemoteChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &remoteFrameClient);
 
     FrameTestHelpers::TestWebFrameClient client;
     WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
@@ -7130,6 +7130,7 @@ TEST_F(WebFrameSwapTest, SwapParentShouldDetachChildren)
     // TestWebFrameClient.
     reset();
     remoteFrame->close();
+    childRemoteFrame->close();
 }
 
 TEST_F(WebFrameSwapTest, SwapPreservesGlobalContext)