Log SANACLAP suppressions

third_party/WebKit/Source/core/layout/ScrollAnchor.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 "core/layout/ScrollAnchor.h"
 
 #include "core/frame/FrameView.h"
 #include "core/frame/UseCounter.h"
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/api/LayoutBoxItem.h"
@@ skipping 245 matching lines @@
         return;
     IntSize adjustment = computeAdjustment();
     if (adjustment.isZero())
         return;
 
     if (m_scrollAnchorDisablingStyleChanged) {
         // Note that we only clear if the adjustment would have been non-zero.
         // This minimizes redundant calls to findAnchor.
         // TODO(skobes): add UMA metric for this.
         clear();
+
+        DEFINE_STATIC_LOCAL(EnumerationHistogram, suppressedBySanaclapHistogram,
+            ("Layout.ScrollAnchor.SuppressedBySanaclap", 2));
+        suppressedBySanaclapHistogram.count(1);
+
         return;
     }
 
     m_scroller->setScrollPosition(m_scroller->scrollPositionDouble() + adjustment, AnchoringScroll);
 
     // Update UMA metric.
     DEFINE_STATIC_LOCAL(EnumerationHistogram, adjustedOffsetHistogram,
         ("Layout.ScrollAnchor.AdjustedScrollOffset", 2));
     adjustedOffsetHistogram.count(1);
     UseCounter::count(scrollerLayoutBox(m_scroller)->document(), UseCounter::ScrollAnchored);
@@ skipping 13 matching lines @@
     return m_anchorObject == layoutObject;
 }
 
 void ScrollAnchor::notifyRemoved(LayoutObject* layoutObject)
 {
     if (m_anchorObject == layoutObject)
         clear();
 }
 
 } // namespace blink