Remove HistogramSupport abstraction layer

Source/core/css/FontFaceSet.cpp

Index: Source/core/css/FontFaceSet.cpp
diff --git a/Source/core/css/FontFaceSet.cpp b/Source/core/css/FontFaceSet.cpp
index d53215d7023c1009034c8c82f2734a7e9b312ee5..8c8f84b492c8655d6db8beb2d9c44a50c12d86da 100644
--- a/Source/core/css/FontFaceSet.cpp
+++ b/Source/core/css/FontFaceSet.cpp
@@ -41,7 +41,7 @@
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
-#include "core/platform/HistogramSupport.h"
+#include "public/platform/Platform.h"
 
 namespace WebCore {
 
@@ -442,7 +442,7 @@ void FontFaceSet::FontLoadHistogram::record()
     if (m_recorded)
         return;
     m_recorded = true;
-    HistogramSupport::histogramCustomCounts("WebFont.WebFontsInPage", m_count, 1, 100, 50);
+    WebKit::Platform::current()->histogramCustomCounts("WebFont.WebFontsInPage", m_count, 1, 100, 50);
 }
 
 static const char* supplementName()