Revert "Sky: When an iframe element is removed, delete its mojo View."

sky/engine/core/html/HTMLIFrameElement.cpp

Index: sky/engine/core/html/HTMLIFrameElement.cpp
diff --git a/sky/engine/core/html/HTMLIFrameElement.cpp b/sky/engine/core/html/HTMLIFrameElement.cpp
index 30721b78c65c0ddbffc594b0709129e3a3aa17c8..29b0908cced9a23bf9767949d267f86f4c51d62c 100644
--- a/sky/engine/core/html/HTMLIFrameElement.cpp
+++ b/sky/engine/core/html/HTMLIFrameElement.cpp
@@ -26,8 +26,6 @@ HTMLIFrameElement::HTMLIFrameElement(Document& document)
 
 HTMLIFrameElement::~HTMLIFrameElement()
 {
-    if (m_contentView)
-        m_contentView->RemoveObserver(this);
 }
 
 Node::InsertionNotificationRequest HTMLIFrameElement::insertedInto(ContainerNode* insertionPoint)
@@ -41,8 +39,9 @@ Node::InsertionNotificationRequest HTMLIFrameElement::insertedInto(ContainerNode
 void HTMLIFrameElement::removedFrom(ContainerNode* insertionPoint)
 {
     HTMLElement::removedFrom(insertionPoint);
-    if (m_contentView)
-        m_contentView->Destroy();
+    if (insertionPoint->inDocument()) {
+        // TODO(mpcomplete): Tear down the mojo View.
+    }
 }
 
 RenderObject* HTMLIFrameElement::createRenderer(RenderStyle* style)
@@ -68,8 +67,6 @@ void HTMLIFrameElement::createView()
 
     KURL url = document().completeURL(urlString);
     m_contentView = parentFrame->loaderClient()->createChildFrame(url);
-    if (m_contentView)
-        m_contentView->AddObserver(this);
 }
 
 }