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

third_party/WebKit/Source/core/frame/DOMWindow.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/DOMWindow.h"
 
 #include <memory>
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/SecurityContext.h"
@@ skipping 369 matching lines @@
           ConsoleMessage::create(
               JSMessageSource, WarningMessageLevel,
               "Scripts may close only the windows that were opened by it."));
     }
     return;
   }
 
   if (!frame()->shouldClose())
     return;
 
-  InspectorInstrumentation::NativeBreakpoint nativeBreakpoint(
-      context, "DOMWindow.close", true);
+  InspectorInstrumentation::breakIfNeeded(context, "DOMWindow.close");
 
   page->closeSoon();
 
   // So as to make window.closed return the expected result
   // after window.close(), separately record the to-be-closed
   // state of this window. Scripts may access window.closed
   // before the deferred close operation has gone ahead.
   m_windowIsClosing = true;
 }
 
@@ skipping 30 matching lines @@
 }
 
 DEFINE_TRACE(DOMWindow) {
   visitor->trace(m_frame);
   visitor->trace(m_inputCapabilities);
   visitor->trace(m_location);
   EventTargetWithInlineData::trace(visitor);
 }
 
 }  // namespace blink