Update Blink to use the tree scope info on WebFrame for scoping checks.

Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 5608 matching lines @@
         , m_willSendRequestCallCount(0)
         , m_childFrameCreationCount(0)
     {
     }
 
     void setChildWebFrameClient(TestCachePolicyWebFrameClient* client) { m_childClient = client; }
     WebURLRequest::CachePolicy cachePolicy() const { return m_policy; }
     int willSendRequestCallCount() const { return m_willSendRequestCallCount; }
     int childFrameCreationCount() const { return m_childFrameCreationCount; }
 
-    virtual WebFrame* createChildFrame(WebLocalFrame* parent, const WebString&, WebSandboxFlags)
+    virtual WebFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString&, WebSandboxFlags)
     {
         ASSERT(m_childClient);
         m_childFrameCreationCount++;
-        WebFrame* frame = WebLocalFrame::create(m_childClient);
+        WebFrame* frame = WebLocalFrame::create(scope, m_childClient);
         parent->appendChild(frame);
         return frame;
     }
 
     virtual void didStartLoading(bool toDifferentDocument)
     {
         if (m_parentClient) {
             m_parentClient->didStartLoading(toDifferentDocument);
             return;
         }
@@ skipping 345 matching lines @@
     // After commit, there is.
     HistoryItem* item = mainFrameLoader.currentItem();
     ASSERT_TRUE(item);
     EXPECT_EQ(WTF::String(url.data()), item->urlString());
 }
 
 class FailCreateChildFrame : public FrameTestHelpers::TestWebFrameClient {
 public:
     FailCreateChildFrame() : m_callCount(0) { }
 
-    virtual WebFrame* createChildFrame(WebLocalFrame* parent, const WebString& frameName, WebSandboxFlags sandboxFlags) override
+    virtual WebFrame* createChildFrame(WebLocalFrame* parent, WebTreeScopeType scope, const WebString& frameName, WebSandboxFlags sandboxFlags) override
     {
         ++m_callCount;
         return 0;
     }
 
     int callCount() const { return m_callCount; }
 
 private:
     int m_callCount;
 };
@@ skipping 671 matching lines @@
 // doesn't leave behind dangling pointers.
 TEST_F(WebFrameTest, EmbedderTriggeredDetachWithRemoteMainFrame)
 {
     // FIXME: Refactor some of this logic into WebViewHelper to make it easier to
     // write tests with a top-level remote frame.
     FrameTestHelpers::TestWebViewClient viewClient;
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebView* view = WebView::create(&viewClient);
     view->setMainFrame(remoteClient.frame());
     FrameTestHelpers::TestWebFrameClient childFrameClient;
-    WebLocalFrame* childFrame = view->mainFrame()->toWebRemoteFrame()->createLocalChild("", WebSandboxFlags::None, &childFrameClient, nullptr);
+    WebLocalFrame* childFrame = view->mainFrame()->toWebRemoteFrame()->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &childFrameClient, nullptr);
 
     // Purposely keep the LocalFrame alive so it's the last thing to be destroyed.
     RefPtrWillBePersistent<Frame> childCoreFrame = toCoreFrame(childFrame);
     view->close();
     childCoreFrame.clear();
 }
 
 class WebFrameSwapTest : public WebFrameTest {
 protected:
     WebFrameSwapTest()
     {
         registerMockedHttpURLLoad("frame-a-b-c.html");
         registerMockedHttpURLLoad("subframe-a.html");
         registerMockedHttpURLLoad("subframe-b.html");
         registerMockedHttpURLLoad("subframe-c.html");
         registerMockedHttpURLLoad("subframe-hello.html");
 
         m_webViewHelper.initializeAndLoad(m_baseURL + "frame-a-b-c.html", true);
     }
 
     void reset() { m_webViewHelper.reset(); }
     WebFrame* mainFrame() const { return m_webViewHelper.webView()->mainFrame(); }
 
 private:
     FrameTestHelpers::WebViewHelper m_webViewHelper;
 };
 
 TEST_F(WebFrameSwapTest, SwapMainFrame)
 {
-    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(nullptr);
+    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(WebTreeScopeType::Document, nullptr);
     mainFrame()->swap(remoteFrame);
 
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     remoteFrame->swap(localFrame);
 
     // Finally, make sure an embedder triggered load in the local frame swapped
     // back in works.
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     std::string content = localFrame->contentAsText(1024).utf8();
     EXPECT_EQ("hello", content);
 
     // Manually reset to break WebViewHelper's dependency on the stack allocated
     // TestWebFrameClient.
     reset();
     remoteFrame->close();
 }
 
 void swapAndVerifyFirstChildConsistency(const char* const message, WebFrame* parent, WebFrame* newChild)
 {
     SCOPED_TRACE(message);
     parent->firstChild()->swap(newChild);
 
     EXPECT_EQ(newChild, parent->firstChild());
     EXPECT_EQ(newChild->parent(), parent);
     EXPECT_EQ(newChild, parent->lastChild()->previousSibling()->previousSibling());
     EXPECT_EQ(newChild->nextSibling(), parent->lastChild()->previousSibling());
 }
 
 TEST_F(WebFrameSwapTest, SwapFirstChild)
 {
-    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(nullptr);
+    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(WebTreeScopeType::Document, nullptr);
     swapAndVerifyFirstChildConsistency("local->remote", mainFrame(), remoteFrame);
 
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     swapAndVerifyFirstChildConsistency("remote->local", mainFrame(), localFrame);
 
     // FIXME: This almost certainly fires more load events on the iframe element
     // than it should.
     // Finally, make sure an embedder triggered load in the local frame swapped
     // back in works.
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     std::string content = localFrame->contentAsText(1024).utf8();
     EXPECT_EQ("hello", content);
@@ skipping 13 matching lines @@
     EXPECT_EQ(newChild, parent->lastChild()->previousSibling());
     EXPECT_EQ(newChild->parent(), parent);
     EXPECT_EQ(newChild, parent->firstChild()->nextSibling());
     EXPECT_EQ(newChild->previousSibling(), parent->firstChild());
     EXPECT_EQ(newChild, parent->lastChild()->previousSibling());
     EXPECT_EQ(newChild->nextSibling(), parent->lastChild());
 }
 
 TEST_F(WebFrameSwapTest, SwapMiddleChild)
 {
-    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(nullptr);
+    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(WebTreeScopeType::Document, nullptr);
     swapAndVerifyMiddleChildConsistency("local->remote", mainFrame(), remoteFrame);
 
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     swapAndVerifyMiddleChildConsistency("remote->local", mainFrame(), localFrame);
 
     // FIXME: This almost certainly fires more load events on the iframe element
     // than it should.
     // Finally, make sure an embedder triggered load in the local frame swapped
     // back in works.
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     std::string content = localFrame->contentAsText(1024).utf8();
     EXPECT_EQ("hello", content);
@@ skipping 10 matching lines @@
     parent->lastChild()->swap(newChild);
 
     EXPECT_EQ(newChild, parent->lastChild());
     EXPECT_EQ(newChild->parent(), parent);
     EXPECT_EQ(newChild, parent->firstChild()->nextSibling()->nextSibling());
     EXPECT_EQ(newChild->previousSibling(), parent->firstChild()->nextSibling());
 }
 
 TEST_F(WebFrameSwapTest, SwapLastChild)
 {
-    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(nullptr);
+    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(WebTreeScopeType::Document, nullptr);
     swapAndVerifyLastChildConsistency("local->remote", mainFrame(), remoteFrame);
 
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     swapAndVerifyLastChildConsistency("remote->local", mainFrame(), localFrame);
 
     // FIXME: This almost certainly fires more load events on the iframe element
     // than it should.
     // Finally, make sure an embedder triggered load in the local frame swapped
     // back in works.
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     std::string content = localFrame->contentAsText(1024).utf8();
     EXPECT_EQ("hello", content);
@@ skipping 10 matching lines @@
 
     EXPECT_TRUE(oldFrame->firstChild());
     oldFrame->swap(newFrame);
 
     EXPECT_FALSE(newFrame->firstChild());
     EXPECT_FALSE(newFrame->lastChild());
 }
 
 TEST_F(WebFrameSwapTest, SwapParentShouldDetachChildren)
 {
-    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(0);
+    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(WebTreeScopeType::Document, nullptr);
     WebFrame* targetFrame = mainFrame()->firstChild()->nextSibling();
     EXPECT_TRUE(targetFrame);
     swapAndVerifySubframeConsistency("local->remote", targetFrame, remoteFrame);
 
     targetFrame = mainFrame()->firstChild()->nextSibling();
     EXPECT_TRUE(targetFrame);
 
     // Create child frames in the target frame before testing the swap.
     FrameTestHelpers::TestWebRemoteFrameClient remoteFrameClient;
-    remoteFrame->createRemoteChild("", WebSandboxFlags::None, &remoteFrameClient);
+    remoteFrame->createRemoteChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &remoteFrameClient);
 
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     swapAndVerifySubframeConsistency("remote->local", targetFrame, localFrame);
 
     // FIXME: This almost certainly fires more load events on the iframe element
     // than it should.
     // Finally, make sure an embedder triggered load in the local frame swapped
     // back in works.
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     std::string content = localFrame->contentAsText(1024).utf8();
     EXPECT_EQ("hello", content);
@@ skipping 35 matching lines @@
     v8::Local<v8::Value> remoteWindow = mainFrame()->executeScriptAndReturnValue(WebScriptSource(
         "document.querySelector('#frame2').contentWindow;"));
     EXPECT_TRUE(originalWindow->StrictEquals(remoteWindow));
     // Check that its view is consistent with the world.
     v8::Local<v8::Value> remoteWindowTop = mainFrame()->executeScriptAndReturnValue(WebScriptSource(
         "document.querySelector('#frame2').contentWindow.top;"));
     EXPECT_TRUE(windowTop->StrictEquals(remoteWindowTop));
 
     // Now check that remote -> local works too, since it goes through a different code path.
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     remoteFrame->swap(localFrame);
     v8::Local<v8::Value> localWindow = mainFrame()->executeScriptAndReturnValue(WebScriptSource(
         "document.querySelector('#frame2').contentWindow;"));
     EXPECT_TRUE(originalWindow->StrictEquals(localWindow));
     v8::Local<v8::Value> localWindowTop = mainFrame()->executeScriptAndReturnValue(WebScriptSource(
         "document.querySelector('#frame2').contentWindow.top;"));
     EXPECT_TRUE(windowTop->StrictEquals(localWindowTop));
 
     // Manually reset to break WebViewHelper's dependency on the stack allocated
@@ skipping 14 matching lines @@
 
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebRemoteFrame* remoteFrame = remoteClient.frame();
     mainFrame()->lastChild()->swap(remoteFrame);
     remoteFrame->setReplicatedOrigin(SecurityOrigin::createUnique());
     v8::Local<v8::Value> remoteWindowTop = mainFrame()->executeScriptAndReturnValue(WebScriptSource("saved.top"));
     EXPECT_TRUE(remoteWindowTop->IsObject());
     EXPECT_TRUE(windowTop->StrictEquals(remoteWindowTop));
 
     FrameTestHelpers::TestWebFrameClient client;
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     remoteFrame->swap(localFrame);
     v8::Local<v8::Value> localWindowTop = mainFrame()->executeScriptAndReturnValue(WebScriptSource("saved.top"));
     EXPECT_TRUE(localWindowTop->IsObject());
     EXPECT_TRUE(windowTop->StrictEquals(localWindowTop));
 
     reset();
 }
 
 TEST_F(WebFrameSwapTest, RemoteFramesAreIndexable)
@@ skipping 51 matching lines @@
 TEST_F(WebFrameSwapTest, FramesOfRemoteParentAreIndexable)
 {
     v8::HandleScope scope(v8::Isolate::GetCurrent());
 
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebRemoteFrame* remoteParentFrame = remoteClient.frame();
     mainFrame()->swap(remoteParentFrame);
     remoteParentFrame->setReplicatedOrigin(SecurityOrigin::createUnique());
 
     FrameTestHelpers::TestWebFrameClient childFrameClient;
-    WebLocalFrame* childFrame = remoteParentFrame->createLocalChild("", WebSandboxFlags::None, &childFrameClient, nullptr);
+    WebLocalFrame* childFrame = remoteParentFrame->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &childFrameClient, nullptr);
     FrameTestHelpers::loadFrame(childFrame, m_baseURL + "subframe-hello.html");
 
     v8::Local<v8::Value> window = childFrame->executeScriptAndReturnValue(WebScriptSource("window"));
     v8::Local<v8::Value> childOfRemoteParent = childFrame->executeScriptAndReturnValue(WebScriptSource("parent.frames[0]"));
     EXPECT_TRUE(childOfRemoteParent->IsObject());
     EXPECT_TRUE(window->StrictEquals(childOfRemoteParent));
 
     v8::Local<v8::Value> windowLength = childFrame->executeScriptAndReturnValue(WebScriptSource("parent.frames.length"));
     ASSERT_TRUE(windowLength->IsInt32());
     EXPECT_EQ(1, windowLength.As<v8::Int32>()->Value());
 
     // Manually reset to break WebViewHelper's dependency on the stack allocated clients.
     reset();
 }
 
 // Check that frames with a remote parent don't crash while accessing window.frameElement.
 TEST_F(WebFrameSwapTest, FrameElementInFramesWithRemoteParent)
 {
     v8::HandleScope scope(v8::Isolate::GetCurrent());
 
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebRemoteFrame* remoteParentFrame = remoteClient.frame();
     mainFrame()->swap(remoteParentFrame);
     remoteParentFrame->setReplicatedOrigin(SecurityOrigin::createUnique());
 
     FrameTestHelpers::TestWebFrameClient childFrameClient;
-    WebLocalFrame* childFrame = remoteParentFrame->createLocalChild("", WebSandboxFlags::None, &childFrameClient, nullptr);
+    WebLocalFrame* childFrame = remoteParentFrame->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &childFrameClient, nullptr);
     FrameTestHelpers::loadFrame(childFrame, m_baseURL + "subframe-hello.html");
 
     v8::Local<v8::Value> frameElement = childFrame->executeScriptAndReturnValue(WebScriptSource("window.frameElement"));
     // frameElement shouldn't be accessible cross-origin.
     EXPECT_TRUE(frameElement.IsEmpty());
 
     // Manually reset to break WebViewHelper's dependency on the stack allocated clients.
     reset();
 }
 
@@ skipping 12 matching lines @@
     }
 
     WebHistoryCommitType historyCommitType() const { return m_historyCommitType; }
 
     WebHistoryCommitType m_historyCommitType;
     WebRemoteFrame* m_remoteFrame;
 };
 
 TEST_F(WebFrameSwapTest, HistoryCommitTypeAfterRemoteToLocalSwap)
 {
-    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(nullptr);
+    WebRemoteFrame* remoteFrame = WebRemoteFrame::create(WebTreeScopeType::Document, nullptr);
     WebFrame* targetFrame = mainFrame()->firstChild();
     ASSERT_TRUE(targetFrame);
     targetFrame->swap(remoteFrame);
     ASSERT_TRUE(mainFrame()->firstChild());
     ASSERT_EQ(mainFrame()->firstChild(), remoteFrame);
 
     RemoteToLocalSwapWebFrameClient client(remoteFrame);
-    WebLocalFrame* localFrame = WebLocalFrame::create(&client);
+    WebLocalFrame* localFrame = WebLocalFrame::create(WebTreeScopeType::Document, &client);
     localFrame->initializeToReplaceRemoteFrame(remoteFrame, "", WebSandboxFlags::None);
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     EXPECT_EQ(WebStandardCommit, client.historyCommitType());
 
     // Manually reset to break WebViewHelper's dependency on the stack allocated
     // TestWebFrameClient.
     reset();
     remoteFrame->close();
 }
 
@@ skipping 70 matching lines @@
 TEST_F(WebFrameTest, RemoteFrameInitialCommitType)
 {
     FrameTestHelpers::TestWebViewClient viewClient;
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebView* view = WebView::create(&viewClient);
     view->setMainFrame(remoteClient.frame());
     toRemoteFrame(toCoreFrame(view->mainFrame()))->securityContext()->setReplicatedOrigin(SecurityOrigin::create(toKURL(m_baseURL)));
 
     // If an iframe has a remote main frame, ensure the inital commit is correctly identified as WebInitialCommitInChildFrame.
     CommitTypeWebFrameClient childFrameClient;
-    WebLocalFrame* childFrame = view->mainFrame()->toWebRemoteFrame()->createLocalChild("", WebSandboxFlags::None, &childFrameClient, nullptr);
+    WebLocalFrame* childFrame = view->mainFrame()->toWebRemoteFrame()->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &childFrameClient, nullptr);
     registerMockedHttpURLLoad("foo.html");
     FrameTestHelpers::loadFrame(childFrame, m_baseURL + "foo.html");
     EXPECT_EQ(WebInitialCommitInChildFrame, childFrameClient.historyCommitType());
     view->close();
 }
 
 class MockDocumentThreadableLoaderClient : public DocumentThreadableLoaderClient {
 public:
     MockDocumentThreadableLoaderClient() : m_failed(false) { }
     virtual void didFail(const ResourceError&) override { m_failed = true;}
@@ skipping 38 matching lines @@
     EXPECT_FALSE(client.failed());
 }
 
 TEST_F(WebFrameTest, DetachRemoteFrame)
 {
     FrameTestHelpers::TestWebViewClient viewClient;
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebView* view = WebView::create(&viewClient);
     view->setMainFrame(remoteClient.frame());
     FrameTestHelpers::TestWebRemoteFrameClient childFrameClient;
-    WebRemoteFrame* childFrame = view->mainFrame()->toWebRemoteFrame()->createRemoteChild("", WebSandboxFlags::None, &childFrameClient);
+    WebRemoteFrame* childFrame = view->mainFrame()->toWebRemoteFrame()->createRemoteChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, &childFrameClient);
     childFrame->detach();
     view->close();
 }
 
 class TestConsoleMessageWebFrameClient : public FrameTestHelpers::TestWebFrameClient {
 public:
     virtual void didAddMessageToConsole(const WebConsoleMessage& message, const WebString& sourceName, unsigned sourceLine, const WebString& stackTrace)
     {
         messages.push_back(message);
     }
@@ skipping 40 matching lines @@
 }
 
 TEST_F(WebFrameTest, CreateLocalChildWithPreviousSibling)
 {
     FrameTestHelpers::TestWebViewClient viewClient;
     FrameTestHelpers::TestWebRemoteFrameClient remoteClient;
     WebView* view = WebView::create(&viewClient);
     view->setMainFrame(remoteClient.frame());
     WebRemoteFrame* parent = view->mainFrame()->toWebRemoteFrame();
 
-    WebLocalFrame* secondFrame = parent->createLocalChild("", WebSandboxFlags::None, nullptr, nullptr);
-    WebLocalFrame* fourthFrame = parent->createLocalChild("", WebSandboxFlags::None, nullptr, secondFrame);
-    WebLocalFrame* thirdFrame = parent->createLocalChild("", WebSandboxFlags::None, nullptr, secondFrame);
-    WebLocalFrame* firstFrame = parent->createLocalChild("", WebSandboxFlags::None, nullptr, nullptr);
+    WebLocalFrame* secondFrame = parent->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, nullptr, nullptr);
+    WebLocalFrame* fourthFrame = parent->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, nullptr, secondFrame);
+    WebLocalFrame* thirdFrame = parent->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, nullptr, secondFrame);
+    WebLocalFrame* firstFrame = parent->createLocalChild(WebTreeScopeType::Document, "", WebSandboxFlags::None, nullptr, nullptr);
 
     EXPECT_EQ(firstFrame, parent->firstChild());
     EXPECT_EQ(nullptr, firstFrame->previousSibling());
     EXPECT_EQ(secondFrame, firstFrame->nextSibling());
 
     EXPECT_EQ(firstFrame, secondFrame->previousSibling());
     EXPECT_EQ(thirdFrame, secondFrame->nextSibling());
 
     EXPECT_EQ(secondFrame, thirdFrame->previousSibling());
     EXPECT_EQ(fourthFrame, thirdFrame->nextSibling());
 
     EXPECT_EQ(thirdFrame, fourthFrame->previousSibling());
     EXPECT_EQ(nullptr, fourthFrame->nextSibling());
     EXPECT_EQ(fourthFrame, parent->lastChild());
 
     EXPECT_EQ(parent, firstFrame->parent());
     EXPECT_EQ(parent, secondFrame->parent());
     EXPECT_EQ(parent, thirdFrame->parent());
     EXPECT_EQ(parent, fourthFrame->parent());
 
     view->close();
 }
 
 } // namespace blink