Add some TRACE_EVENTs to measure TEXTAREA paste performance.

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

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 40 matching lines @@
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLBRElement.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLLIElement.h"
 #include "core/html/HTMLQuoteElement.h"
 #include "core/html/HTMLSelectElement.h"
 #include "core/html/HTMLSpanElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutText.h"
+#include "platform/TraceEvent.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 enum EFragmentType { EmptyFragment, SingleTextNodeFragment, TreeFragment };
 
 // --- ReplacementFragment helper class
@@ skipping 77 matching lines @@
     : m_document(document)
     , m_fragment(fragment)
     , m_hasInterchangeNewlineAtStart(false)
     , m_hasInterchangeNewlineAtEnd(false)
 {
     if (!m_document)
         return;
     if (!m_fragment || !m_fragment->hasChildren())
         return;
 
+    TRACE_EVENT0("blink", "ReplacementFragment constructor");
     RefPtrWillBeRawPtr<Element> editableRoot = selection.rootEditableElement();
     ASSERT(editableRoot);
     if (!editableRoot)
         return;
 
     Element* shadowAncestorElement;
     if (editableRoot->isInShadowTree())
         shadowAncestorElement = editableRoot->shadowHost();
     else
         shadowAncestorElement = editableRoot.get();
@@ skipping 82 matching lines @@
 
     ContainerNode* parent = refNode->nonShadowBoundaryParentNode();
     if (!parent)
         return;
 
     parent->insertBefore(node, refNode);
 }
 
 PassRefPtrWillBeRawPtr<HTMLElement> ReplacementFragment::insertFragmentForTestRendering(Element* rootEditableElement)
 {
+    TRACE_EVENT0("blink", "ReplacementFragment::insertFragmentForTestRendering");
     ASSERT(m_document);
     RefPtrWillBeRawPtr<HTMLElement> holder = createDefaultParagraphElement(*m_document.get());
 
     holder->appendChild(m_fragment);
     rootEditableElement->appendChild(holder.get());
     m_document->updateLayoutIgnorePendingStylesheets();
 
     return holder.release();
 }
 
@@ skipping 671 matching lines @@
 }
 
 static inline HTMLElement* elementToSplitToAvoidPastingIntoInlineElementsWithStyle(const Position& insertionPos)
 {
     Element* containingBlock = enclosingBlock(insertionPos.computeContainerNode());
     return toHTMLElement(highestEnclosingNodeOfType(insertionPos, isInlineHTMLElementWithStyle, CannotCrossEditingBoundary, containingBlock));
 }
 
 void ReplaceSelectionCommand::doApply(EditingState* editingState)
 {
+    TRACE_EVENT0("blink", "ReplaceSelectionCommand::doApply");
     const VisibleSelection selection = endingSelection();
     ASSERT(selection.isCaretOrRange());
     ASSERT(selection.start().anchorNode());
     if (!selection.isNonOrphanedCaretOrRange() || !selection.start().anchorNode())
         return;
 
     if (!selection.rootEditableElement())
         return;
 
     ReplacementFragment fragment(&document(), m_documentFragment.get(), selection);
@@ skipping 704 matching lines @@
     visitor->trace(m_startOfInsertedContent);
     visitor->trace(m_endOfInsertedContent);
     visitor->trace(m_insertionStyle);
     visitor->trace(m_documentFragment);
     visitor->trace(m_startOfInsertedRange);
     visitor->trace(m_endOfInsertedRange);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink