Blink-side contiguous allocation of display items.

Source/platform/graphics/ListContainerTest.cpp

Index: Source/platform/graphics/ListContainerTest.cpp
diff --git a/Source/platform/graphics/ListContainerTest.cpp b/Source/platform/graphics/ListContainerTest.cpp
index b92b588bcb977fdb77a9bd1e13ba78e1e440cbbd..7245bb2796b416204d2f14a71beb84d32bb20788 100644
--- a/Source/platform/graphics/ListContainerTest.cpp
+++ b/Source/platform/graphics/ListContainerTest.cpp
@@ -853,6 +853,20 @@ TEST(ListContainerTest, AppendByMovingDoesNotDestruct)
     EXPECT_CALL(*mde1, Destruct());
 }
 
+TEST(ListContainerTest, AppendByMovingReturnsMovedPointer)
+{
+    ListContainer<SimpleDerivedElement> list1(kCurrentLargestDerivedElementSize);
+    ListContainer<SimpleDerivedElement> list2(kCurrentLargestDerivedElementSize);
+    SimpleDerivedElement* simpleElement = list1.allocateAndConstruct<SimpleDerivedElement>();
+
+    SimpleDerivedElement* movedElement1 = list2.appendByMoving(simpleElement);
+    EXPECT_EQ(list2.back(), movedElement1);
+
+    SimpleDerivedElement* movedElement2 = list1.appendByMoving(movedElement1);
+    EXPECT_EQ(list1.back(), movedElement2);
+    EXPECT_NE(movedElement1, movedElement2);
+}
+
 TEST(ListContainerTest, AppendByMovingReplacesSourceWithNewDerivedElement)
 {
     ListContainer<SimpleDerivedElementConstructMagicNumberOne> list1(kCurrentLargestDerivedElementSize);