Make DisplayItem::replay const.

third_party/WebKit/Source/platform/graphics/paint/ClipPathDisplayItem.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 "platform/graphics/paint/ClipPathDisplayItem.h"
 
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/Path.h"
 #include "public/platform/WebDisplayItemList.h"
 #include "third_party/skia/include/core/SkScalar.h"
 
 namespace blink {
 
-void BeginClipPathDisplayItem::replay(GraphicsContext& context)
+void BeginClipPathDisplayItem::replay(GraphicsContext& context) const
 {
     context.save();
     context.clipPath(m_clipPath, AntiAliased);
 }
 
 void BeginClipPathDisplayItem::appendToWebDisplayItemList(WebDisplayItemList* list) const
 {
     list->appendClipPathItem(m_clipPath, SkRegion::kIntersect_Op, true);
 }
 
-void EndClipPathDisplayItem::replay(GraphicsContext& context)
+void EndClipPathDisplayItem::replay(GraphicsContext& context) const
 {
     context.restore();
 }
 
 void EndClipPathDisplayItem::appendToWebDisplayItemList(WebDisplayItemList* list) const
 {
     list->appendEndClipPathItem();
 }
 
 #ifndef NDEBUG
 void BeginClipPathDisplayItem::dumpPropertiesAsDebugString(WTF::StringBuilder& stringBuilder) const
 {
     DisplayItem::dumpPropertiesAsDebugString(stringBuilder);
     stringBuilder.append(WTF::String::format(", pathVerbs: %d, pathPoints: %d, windRule: \"%s\"",
         m_clipPath.countVerbs(), m_clipPath.countPoints(),
         m_clipPath.getFillType() == SkPath::kWinding_FillType ? "nonzero" : "evenodd"));
 }
 
 #endif
 
 } // namespace blink