Move the frame tree into the embedder.

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 6dfe3e8dc4f0e83990ac39e48505a437e6ee1ce7..cf128a99ff3f955f0d26340b079f56046ded7482 100644
--- a/Source/web/tests/WebFrameTest.cpp
+++ b/Source/web/tests/WebFrameTest.cpp
@@ -4721,13 +4721,22 @@ public:
     int willSendRequestCallCount() const { return m_willSendRequestCallCount; }
     int childFrameCreationCount() const { return m_childFrameCreationCount; }
 
-    virtual WebFrame* createChildFrame(WebFrame*, const WebString&)
+    virtual WebFrame* createChildFrame(WebFrame* parent, const WebString&)
     {
         m_childFrameCreationCount++;
-        return WebFrame::create(m_client);
+        WebFrame* frame = WebFrame::create(m_client);
+        parent->appendChild(frame);
+        return frame;
     }
 
-    virtual void willSendRequest(WebFrame* frame, unsigned, WebURLRequest& request, const WebURLResponse&)
+    virtual void frameDetached(WebFrame* frame) OVERRIDE
+    {
+        if (frame->parent())
+            frame->parent()->removeChild(frame);
+        frame->close();
+    }
+
+    virtual void willSendRequest(WebFrame* frame, unsigned, WebURLRequest& request, const WebURLResponse&) OVERRIDE
     {
         m_policy = request.cachePolicy();
         m_willSendRequestCallCount++;
@@ -4752,7 +4761,7 @@ TEST_F(WebFrameTest, ReloadIframe)
     webViewHelper.initializeAndLoad(m_baseURL + "iframe_reload.html", true, &mainClient);
 
     WebFrameImpl* mainFrame = webViewHelper.webViewImpl()->mainFrameImpl();
-    WebFrameImpl* childFrame = toWebFrameImpl(mainFrame->firstChild());
+    RefPtr<WebFrameImpl> childFrame = toWebFrameImpl(mainFrame->firstChild());
     ASSERT_EQ(childFrame->client(), &childClient);
     EXPECT_EQ(mainClient.childFrameCreationCount(), 1);
     EXPECT_EQ(childClient.willSendRequestCallCount(), 1);
@@ -4762,7 +4771,7 @@ TEST_F(WebFrameTest, ReloadIframe)
     Platform::current()->unitTestSupport()->serveAsynchronousMockedRequests();
 
     // A new WebFrame should have been created, but the child WebFrameClient should be reused.
-    ASSERT_FALSE(childFrame == toWebFrameImpl(mainFrame->firstChild()));
+    ASSERT_NE(childFrame, toWebFrameImpl(mainFrame->firstChild()));
     ASSERT_EQ(toWebFrameImpl(mainFrame->firstChild())->client(), &childClient);
 
     EXPECT_EQ(mainClient.childFrameCreationCount(), 2);