Remove LayoutAnalyzer UMA

Source/core/layout/LayoutAnalyzer.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/layout/LayoutAnalyzer.h"
 
 #include "core/frame/FrameView.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutText.h"
 #include "platform/TracedValue.h"
-#include "public/platform/Platform.h"
 
 namespace blink {
 
 LayoutAnalyzer::Scope::Scope(const LayoutObject& o)
     : m_layoutObject(o)
     , m_analyzer(o.frameView()->layoutAnalyzer())
 {
     if (m_analyzer)
         m_analyzer->push(o);
 }
@@ skipping 51 matching lines @@
     // stack recursion depth, not layout tree depth or DOM tree depth.
     m_counters[LayoutAnalyzerStackMaximumDepth] = max(m_counters[LayoutAnalyzerStackMaximumDepth], m_depth);
 }
 
 void LayoutAnalyzer::pop(const LayoutObject& o)
 {
     ASSERT(m_depth > 0);
     --m_depth;
 }
 
-void LayoutAnalyzer::recordCounters()
-{
-    unsigned totalNodes = m_counters[TotalLayoutObjectsThatWereLaidOut];
-    if (totalNodes < 100)
-        return;
-    unsigned usPerNode = (1000.0 * (currentTimeMS() - m_startMs)) / totalNodes;
-    Platform::current()->histogramCustomCounts("Layout.MicroSecondsPerNode", usPerNode, 0, 1000 * 1000, 50);
-    unsigned halfTotalNodes = totalNodes / 2;
-    const char* histogram = nullptr;
-    if (m_counters[LayoutAnalyzer::LayoutObjectsThatAreFloating] > halfTotalNodes) {
-        histogram = "Layout.MicroSecondsPerFloat";
-    } else if (m_counters[LayoutAnalyzer::LayoutObjectsThatAreTableCells] > halfTotalNodes) {
-        histogram = "Layout.MicroSecondsPerTD";
-    } else if (m_counters[LayoutAnalyzer::LayoutObjectsThatAreOutOfFlowPositioned] > halfTotalNodes) {
-        histogram = "Layout.MicroSecondsPerPositioned";
-    } else if (m_counters[LayoutAnalyzer::LayoutObjectsThatAreTextAndCanUseTheSimpleFontCodePath] > halfTotalNodes) {
-        histogram = "Layout.MicroSecondsPerSimpleText";
-    } else if (m_counters[LayoutAnalyzer::LayoutObjectsThatAreTextAndCanNotUseTheSimpleFontCodePath] > halfTotalNodes) {
-        histogram = "Layout.MicroSecondsPerComplexText";
-    }
-    if (histogram)
-        Platform::current()->histogramCustomCounts(histogram, usPerNode, 0, 1000 * 1000, 50);
-}
-
 PassRefPtr<TracedValue> LayoutAnalyzer::toTracedValue()
 {
     RefPtr<TracedValue> tracedValue(TracedValue::create());
     for (size_t i = 0; i < NumCounters; ++i) {
         if (m_counters[i] > 0)
             tracedValue->setInteger(nameForCounter(static_cast<Counter>(i)), m_counters[i]);
     }
     return tracedValue.release();
 }
 
@@ skipping 18 matching lines @@
     case CharactersInLayoutObjectsThatAreTextAndCanNotUseTheSimpleFontCodePath: return "CharactersInLayoutObjectsThatAreTextAndCanNotUseTheSimpleFontCodePath";
     case LayoutObjectsThatAreTextAndCanUseTheSimpleFontCodePath: return "LayoutObjectsThatAreTextAndCanUseTheSimpleFontCodePath";
     case CharactersInLayoutObjectsThatAreTextAndCanUseTheSimpleFontCodePath: return "CharactersInLayoutObjectsThatAreTextAndCanUseTheSimpleFontCodePath";
     case TotalLayoutObjectsThatWereLaidOut: return "TotalLayoutObjectsThatWereLaidOut";
     }
     ASSERT_NOT_REACHED();
     return "";
 }
 
 } // namespace blink