Editing: Pass failure information of RemoveNodeCommand to ReplaceSelectionCommand.

third_party/WebKit/Source/core/editing/commands/RemoveNodeCommand.cpp

 /*
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  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 #include "core/editing/commands/RemoveNodeCommand.h"
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Node.h"
+#include "core/editing/commands/EditingState.h"
 #include "wtf/Assertions.h"
 
 namespace blink {
 
 RemoveNodeCommand::RemoveNodeCommand(PassRefPtrWillBeRawPtr<Node> node, ShouldAssumeContentIsAlwaysEditable shouldAssumeContentIsAlwaysEditable)
     : SimpleEditCommand(node->document())
     , m_node(node)
     , m_shouldAssumeContentIsAlwaysEditable(shouldAssumeContentIsAlwaysEditable)
 {
     ASSERT(m_node);
     ASSERT(m_node->parentNode());
 }
 
-void RemoveNodeCommand::doApply(EditingState*)
+void RemoveNodeCommand::doApply(EditingState* editingState)
 {
     ContainerNode* parent = m_node->parentNode();
     if (!parent || (m_shouldAssumeContentIsAlwaysEditable == DoNotAssumeContentIsAlwaysEditable
         && !parent->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable) && parent->inActiveDocument()))
         return;
     ASSERT(parent->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable) || !parent->inActiveDocument());
 
     m_parent = parent;
     m_refChild = m_node->nextSibling();
 
     m_node->remove(IGNORE_EXCEPTION);
+    // Node::remove dispatch synchronous events such as IFRAME unload events,
+    // and event handlers may break the document. We check the document state
+    // here in order to prevent further processing in bad situation.
+    ASSERT_IN_EDITING_COMMAND(m_node->document().frame());
+    ASSERT_IN_EDITING_COMMAND(m_node->document().documentElement());
 }
 
 void RemoveNodeCommand::doUnapply()
 {
     RefPtrWillBeRawPtr<ContainerNode> parent = m_parent.release();
     RefPtrWillBeRawPtr<Node> refChild = m_refChild.release();
     if (!parent || !parent->hasEditableStyle())
         return;
 
     parent->insertBefore(m_node.get(), refChild.get(), IGNORE_EXCEPTION);
 }
 
 DEFINE_TRACE(RemoveNodeCommand)
 {
     visitor->trace(m_node);
     visitor->trace(m_parent);
     visitor->trace(m_refChild);
     SimpleEditCommand::trace(visitor);
 }
 
 } // namespace blink