Make DisplayItem::replay const.

third_party/WebKit/Source/platform/graphics/paint/FloatClipDisplayItem.cpp

 // Copyright 2014 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/FloatClipDisplayItem.h"
 
 #include "platform/graphics/GraphicsContext.h"
 #include "public/platform/WebDisplayItemList.h"
 #include "third_party/skia/include/core/SkScalar.h"
 
 namespace blink {
 
-void FloatClipDisplayItem::replay(GraphicsContext& context)
+void FloatClipDisplayItem::replay(GraphicsContext& context) const
 {
     context.save();
     context.clip(m_clipRect);
 }
 
 void FloatClipDisplayItem::appendToWebDisplayItemList(WebDisplayItemList* list) const
 {
     list->appendFloatClipItem(m_clipRect);
 }
 
-void EndFloatClipDisplayItem::replay(GraphicsContext& context)
+void EndFloatClipDisplayItem::replay(GraphicsContext& context) const
 {
     context.restore();
 }
 
 void EndFloatClipDisplayItem::appendToWebDisplayItemList(WebDisplayItemList* list) const
 {
     list->appendEndFloatClipItem();
 }
 
 #ifndef NDEBUG
 void FloatClipDisplayItem::dumpPropertiesAsDebugString(WTF::StringBuilder& stringBuilder) const
 {
     DisplayItem::dumpPropertiesAsDebugString(stringBuilder);
     stringBuilder.append(WTF::String::format(", floatClipRect: [%f,%f,%f,%f]}",
         m_clipRect.x(), m_clipRect.y(), m_clipRect.width(), m_clipRect.height()));
 }
 
 #endif
 
 } // namespace blink