Revert of DevTools: do not use RAII for sync native breakpoints, reuse AsyncTask where possible.

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.
@@ skipping 3179 matching lines @@
     return;
   }
 
   if (!hasInsertionPoint)
     open(enteredDocument, ASSERT_NO_EXCEPTION);
 
   DCHECK(m_parser);
   PerformanceMonitor::reportGenericViolation(
       this, PerformanceMonitor::kDiscouragedAPIUse,
       "Avoid using document.write().", 0, nullptr);
-  InspectorInstrumentation::breakIfNeeded(this, "Document.write");
+  InspectorInstrumentation::NativeBreakpoint nativeBreakpoint(
+      this, "Document.write", true);
   m_parser->insert(text);
 }
 
 void Document::write(const String& text,
                      Document* enteredDocument,
                      ExceptionState& exceptionState) {
   write(SegmentedString(text), enteredDocument, exceptionState);
 }
 
 void Document::writeln(const String& text,
@@ skipping 3405 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (blink::Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif