Blink-side contiguous allocation of display items.

Source/core/paint/DisplayItemListPaintTest.cpp

Index: Source/core/paint/DisplayItemListPaintTest.cpp
diff --git a/Source/core/paint/DisplayItemListPaintTest.cpp b/Source/core/paint/DisplayItemListPaintTest.cpp
index 4ccac96c24c32f3dfa60ceb578a338fee83cd637..d1f0efed3674d04713910f7d56395684315c1364 100644
--- a/Source/core/paint/DisplayItemListPaintTest.cpp
+++ b/Source/core/paint/DisplayItemListPaintTest.cpp
@@ -78,9 +78,9 @@ public:
             break; \
         const TestDisplayItem expected[] = { __VA_ARGS__ }; \
         for (size_t index = 0; index < std::min<size_t>(actual.size(), expectedSize); index++) { \
-            TRACE_DISPLAY_ITEMS(index, expected[index], actual[index]); \
-            EXPECT_EQ(expected[index].client(), actual[index].client()); \
-            EXPECT_EQ(expected[index].type(), actual[index].type()); \
+            TRACE_DISPLAY_ITEMS(index, expected[index], *actual.elementAt(index)); \
+            EXPECT_EQ(expected[index].client(), actual.elementAt(index)->client()); \
+            EXPECT_EQ(expected[index].type(), actual.elementAt(index)->type()); \
         } \
     } while (false);