Remove Enumeration Histograms from the Blink Platform API.

third_party/WebKit/Source/core/frame/VisualViewport.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/TextAutosizer.h"
 #include "core/layout/compositing/PaintLayerCompositor.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/Page.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
+#include "platform/Histogram.h"
 #include "platform/TraceEvent.h"
 #include "platform/geometry/DoubleRect.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/GraphicsLayerFactory.h"
 #include "platform/scroll/Scrollbar.h"
 #include "platform/scroll/ScrollbarThemeOverlay.h"
-#include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "public/platform/WebLayer.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "public/platform/WebScrollbar.h"
 #include "public/platform/WebScrollbarLayer.h"
 
 using blink::WebLayer;
 using blink::WebLayerTreeView;
 using blink::WebScrollbar;
 using blink::WebScrollbarLayer;
@@ skipping 616 matching lines @@
         return;
 
     m_maxPageScale = std::max(m_maxPageScale, m_scale);
 }
 
 void VisualViewport::sendUMAMetrics()
 {
     if (m_trackPinchZoomStatsForPage) {
         bool didScale = m_maxPageScale > 0;
 
-        Platform::current()->histogramEnumeration("Viewport.DidScalePage", didScale ? 1 : 0, 2);
+        DEFINE_STATIC_LOCAL(EnumerationHistogram, didScaleHistogram, ("Viewport.DidScalePage", 2));
+        didScaleHistogram.count(didScale ? 1 : 0);
 
         if (didScale) {
             int zoomPercentage = floor(m_maxPageScale * 100);
 
             // See the PageScaleFactor enumeration in histograms.xml for the bucket ranges.
             int bucket = floor(zoomPercentage / 25.f);
 
-            Platform::current()->histogramEnumeration("Viewport.MaxPageScale", bucket, 21);
+            DEFINE_STATIC_LOCAL(EnumerationHistogram, maxScaleHistogram, ("Viewport.MaxPageScale", 21));
+            maxScaleHistogram.count(bucket);
         }
     }
 
     m_maxPageScale = -1;
     m_trackPinchZoomStatsForPage = false;
 }
 
 bool VisualViewport::shouldDisableDesktopWorkarounds() const
 {
     if (!mainFrame() || !mainFrame()->view())
@@ skipping 30 matching lines @@
     } else if (graphicsLayer == m_rootTransformLayer) {
         name =  "Root Transform Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink