Remove HistogramSupport abstraction layer

Source/core/html/parser/HTMLResourcePreloader.cpp

 /*
  * Copyright (C) 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #include "config.h"
 #include "core/html/parser/HTMLResourcePreloader.h"
 
 #include "core/dom/Document.h"
 #include "core/fetch/FetchInitiatorInfo.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/html/HTMLImport.h"
 #include "core/css/MediaList.h"
 #include "core/css/MediaQueryEvaluator.h"
-#include "core/platform/HistogramSupport.h"
 #include "core/rendering/RenderObject.h"
+#include "public/platform/Platform.h"
 
 namespace WebCore {
 
 bool PreloadRequest::isSafeToSendToAnotherThread() const
 {
     return m_initiatorName.isSafeToSendToAnotherThread()
         && m_charset.isSafeToSendToAnotherThread()
         && m_resourceURL.isSafeToSendToAnotherThread()
         && m_mediaAttribute.isSafeToSendToAnotherThread()
         && m_baseURL.isSafeToSendToAnotherThread();
@@ skipping 39 matching lines @@
     Document* executingDocument = m_document->import() ? m_document->import()->master() : m_document;
     Document* loadingDocument = m_document;
 
     ASSERT(executingDocument->frame());
     ASSERT(executingDocument->renderer());
     ASSERT(executingDocument->renderer()->style());
     if (!preload->media().isEmpty() && !mediaAttributeMatches(executingDocument->frame(), executingDocument->renderer()->style(), preload->media()))
         return;
 
     FetchRequest request = preload->resourceRequest(m_document);
-    HistogramSupport::histogramCustomCounts("WebCore.PreloadDelayMs", static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime())), 0, 2000, 20);
+    WebKit::Platform::current()->histogramCustomCounts("WebCore.PreloadDelayMs", static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime())), 0, 2000, 20);
     loadingDocument->fetcher()->preload(preload->resourceType(), request, preload->charset());
 }
 
 
 }