Editing: Tidy up HTML document structure before execCommand().

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 4437 matching lines @@
     if (m_isRunningExecCommand) {
         String message = "We don't execute document.execCommand() this time, because it is called recursively.";
         addConsoleMessage(ConsoleMessage::create(JSMessageSource, WarningMessageLevel, message));
         return false;
     }
     TemporaryChange<bool> executeScope(m_isRunningExecCommand, true);
 
     // Postpone DOM mutation events, which can execute scripts and change
     // DOM tree against implementation assumption.
     EventQueueScope eventQueueScope;
+    Editor::tidyUpHTMLStructure(*this);
     Editor::Command editorCommand = command(this, commandName);
     Platform::current()->histogramSparse("WebCore.Document.execCommand", editorCommand.idForHistogram());
     return editorCommand.execute(value);
 }
 
 bool Document::queryCommandEnabled(const String& commandName, ExceptionState& exceptionState)
 {
     if (!isHTMLDocument() && !isXHTMLDocument()) {
         exceptionState.throwDOMException(InvalidStateError, "queryCommandEnabled is only supported on HTML documents.");
         return false;
@@ skipping 1456 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     Document::WeakDocumentSet& set = Document::liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif