Remove HistogramSupport abstraction layer

Source/core/dom/shadow/ShadowRoot.cpp

 /*
  * Copyright (C) 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 21 matching lines @@
 #include "core/css/StyleSheetList.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/StyleEngine.h"
 #include "core/dom/Text.h"
 #include "core/dom/WhitespaceChildList.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/InsertionPoint.h"
 #include "core/dom/shadow/ShadowRootRareData.h"
 #include "core/editing/markup.h"
-#include "core/platform/HistogramSupport.h"
+#include "public/platform/Platform.h"
 
 namespace WebCore {
 
 struct SameSizeAsShadowRoot : public DocumentFragment, public TreeScope, public DoublyLinkedListNode<ShadowRoot> {
     void* pointers[3];
     unsigned countersAndFlags[1];
 };
 
 COMPILE_ASSERT(sizeof(ShadowRoot) == sizeof(SameSizeAsShadowRoot), shadowroot_should_stay_small);
 
@@ skipping 13 matching lines @@
     , m_resetStyleInheritance(false)
     , m_type(type)
     , m_registeredWithParentShadowRoot(false)
     , m_childInsertionPointsIsValid(false)
 {
     ASSERT(document);
     ScriptWrappable::init(this);
 
     if (type == ShadowRoot::AuthorShadowRoot) {
         ShadowRootUsageOriginType usageType = document->url().protocolIsInHTTPFamily() ? ShadowRootUsageOriginWeb : ShadowRootUsageOriginNotWeb;
-        HistogramSupport::histogramEnumeration("WebCore.ShadowRoot.constructor", usageType, ShadowRootUsageOriginMax);
+        WebKit::Platform::current()->histogramEnumeration("WebCore.ShadowRoot.constructor", usageType, ShadowRootUsageOriginMax);
     }
 }
 
 ShadowRoot::~ShadowRoot()
 {
     ASSERT(!m_prev);
     ASSERT(!m_next);
 
     if (m_shadowRootRareData && m_shadowRootRareData->styleSheets())
         m_shadowRootRareData->styleSheets()->detachFromDocument();
@@ skipping 327 matching lines @@
 
 StyleSheetList* ShadowRoot::styleSheets()
 {
     if (!ensureShadowRootRareData()->styleSheets())
         m_shadowRootRareData->setStyleSheets(StyleSheetList::create(this));
 
     return m_shadowRootRareData->styleSheets();
 }
 
 }