Make DisplayItem::replay const.

third_party/WebKit/Source/platform/graphics/paint/DisplayItemListTest.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/DisplayItemList.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/CachedDisplayItem.h"
@@ skipping 45 matching lines @@
     String debugName() const { return m_name; }
 
 private:
     String m_name;
 };
 
 class TestDisplayItem final : public DisplayItem {
 public:
     TestDisplayItem(const TestDisplayItemClient& client, Type type) : DisplayItem(client, type, sizeof(*this)) { }
 
-    void replay(GraphicsContext&) final { ASSERT_NOT_REACHED(); }
+    void replay(GraphicsContext&) const final { ASSERT_NOT_REACHED(); }
     void appendToWebDisplayItemList(WebDisplayItemList*) const final { ASSERT_NOT_REACHED(); }
 };
 
 #ifndef NDEBUG
 #define TRACE_DISPLAY_ITEMS(i, expected, actual) \
     String trace = String::format("%d: ", (int)i) + "Expected: " + (expected).asDebugString() + " Actual: " + (actual).asDebugString(); \
     SCOPED_TRACE(trace.utf8().data());
 #else
 #define TRACE_DISPLAY_ITEMS(i, expected, actual)
 #endif
@@ skipping 707 matching lines @@
     drawRect(context, client, backgroundDrawingType, FloatRect(0, 0, 100, 100));
 
     displayItemList().commitNewDisplayItems();
     const auto& paintChunks = displayItemList().paintChunks();
     ASSERT_EQ(1u, paintChunks.size());
     EXPECT_EQ(0u, paintChunks[0].beginIndex);
     EXPECT_EQ(1u, paintChunks[0].endIndex);
 }
 
 } // namespace blink