Remove Sparse Histograms from Blink Platform API.

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 181 matching lines @@
 #include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGTitleElement.h"
 #include "core/svg/SVGUseElement.h"
 #include "core/timing/DOMWindowPerformance.h"
 #include "core/timing/Performance.h"
 #include "core/workers/SharedWorkerRepositoryClient.h"
 #include "core/xml/parser/XMLDocumentParser.h"
 #include "platform/DateComponents.h"
 #include "platform/EventDispatchForbiddenScope.h"
+#include "platform/Histogram.h"
 #include "platform/Language.h"
 #include "platform/LengthFunctions.h"
 #include "platform/Logging.h"
 #include "platform/PluginScriptForbiddenScope.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/ScriptForbiddenScope.h"
 #include "platform/TraceEvent.h"
 #include "platform/network/ContentSecurityPolicyParsers.h"
 #include "platform/network/HTTPParsers.h"
 #include "platform/scheduler/CancellableTaskFactory.h"
@@ skipping 4253 matching lines @@
         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());
+
+    DEFINE_STATIC_LOCAL(SparseHistogram, editorCommandHistogram, ("WebCore.Document.execCommand"));
+    editorCommandHistogram.sample(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 1454 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