tracing: remove sampling state profiler

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 1810 matching lines @@
     return;
 
   // Entering here from inside layout, paint etc. would be catastrophic since
   // recalcStyle can tear down the layout tree or (unfortunately) run
   // script. Kill the whole layoutObject if someone managed to get into here in
   // states not allowing tree mutations.
   RELEASE_ASSERT(lifecycle().stateAllowsTreeMutations());
 
   TRACE_EVENT_BEGIN1("blink,devtools.timeline", "UpdateLayoutTree", "beginData",
                      InspectorRecalculateStylesEvent::data(frame()));
-  TRACE_EVENT_SCOPED_SAMPLING_STATE("blink", "UpdateLayoutTree");
 
   unsigned startElementCount = styleEngine().styleForElementCount();
 
   InspectorInstrumentation::willRecalculateStyle(this);
 
   DocumentAnimations::updateAnimationTimingIfNeeded(*this);
   evaluateMediaQueryListIfNeeded();
   updateUseShadowTreesIfNeeded();
   updateDistribution();
   updateStyleInvalidationIfNeeded();
@@ skipping 4560 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = 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().getString().utf8().data());
 }
 #endif