Add UseCounter for overflow -webkit-paged-x and -webkit-paged-y.

third_party/WebKit/Source/core/layout/LayoutBlockFlow.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 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/layout/LayoutBlockFlow.h"
 
+#include <memory>
 #include "core/editing/Editor.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/UseCounter.h"
 #include "core/html/HTMLDialogElement.h"
 #include "core/layout/HitTestLocation.h"
 #include "core/layout/LayoutAnalyzer.h"
 #include "core/layout/LayoutFlowThread.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutMultiColumnFlowThread.h"
 #include "core/layout/LayoutMultiColumnSpannerPlaceholder.h"
 #include "core/layout/LayoutPagedFlowThread.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/TextAutosizer.h"
 #include "core/layout/line/GlyphOverflow.h"
 #include "core/layout/line/InlineIterator.h"
 #include "core/layout/line/InlineTextBox.h"
 #include "core/layout/line/LineWidth.h"
 #include "core/layout/shapes/ShapeOutsideInfo.h"
 #include "core/paint/BlockFlowPaintInvalidator.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/PtrUtil.h"
-#include <memory>
 
 namespace blink {
 
 bool LayoutBlockFlow::s_canPropagateFloatIntoSibling = false;
 
 struct SameSizeAsLayoutBlockFlow : public LayoutBlock {
   LineBoxList lineBoxes;
   void* pointers[2];
 };
 
@@ skipping 4145 matching lines @@
 }
 
 LayoutMultiColumnFlowThread* LayoutBlockFlow::createMultiColumnFlowThread(
     FlowThreadType type) {
   switch (type) {
     case MultiColumnFlowThread:
       return LayoutMultiColumnFlowThread::createAnonymous(document(),
                                                           styleRef());
     case PagedFlowThread:
       // Paged overflow is currently done using the multicol implementation.
+      UseCounter::count(document(), UseCounter::CSSOverflowPaged);
       return LayoutPagedFlowThread::createAnonymous(document(), styleRef());
     default:
       ASSERT_NOT_REACHED();
       return nullptr;
   }
 }
 
 void LayoutBlockFlow::createOrDestroyMultiColumnFlowThreadIfNeeded(
     const ComputedStyle* oldStyle) {
   if (RuntimeEnabledFeatures::layoutNGEnabled())
@@ skipping 354 matching lines @@
   return LayoutBlock::invalidatePaintIfNeeded(paintInvalidationState);
 }
 
 void LayoutBlockFlow::invalidateDisplayItemClients(
     PaintInvalidationReason invalidationReason) const {
   BlockFlowPaintInvalidator(*this).invalidateDisplayItemClients(
       invalidationReason);
 }
 
 }  // namespace blink