Add missing buffer reorg on Deque buffer expansion.

Source/platform/heap/HeapTest.cpp

Index: Source/platform/heap/HeapTest.cpp
diff --git a/Source/platform/heap/HeapTest.cpp b/Source/platform/heap/HeapTest.cpp
index 6c7f071a9fb7bab7a3fbc34f9f1ed2b223d3277d..46b50d355b540799cc096fc675f28c59fe10f614 100644
--- a/Source/platform/heap/HeapTest.cpp
+++ b/Source/platform/heap/HeapTest.cpp
@@ -5347,4 +5347,48 @@ TEST(HeapTest, TraceDeepEagerly)
 #endif
 }
 
+TEST(HeapTest, DequeExpand)
+{
+    // Test expansion of a HeapDeque<>'s buffer.
+
+    typedef HeapDeque<Member<IntWrapper>> IntDeque;
+
+    Persistent<IntDeque> deque = new IntDeque();
+
+    // Append a sequence, bringing about expansion of the

[Nico, 2014/12/31 01:21:38]

of the…?

+    int i = 0;
+    for (; i < 60; ++i)
+        deque->append(IntWrapper::create(i));
+
+    EXPECT_EQ(60u, deque->size());
+    i = 0;
+    for (const auto& intWrapper : *deque) {
+        EXPECT_EQ(i, intWrapper->value());
+        i++;
+    }
+
+    // Remove most of the queued objects..
+    for (i = 0; i < 50; ++i)
+        deque->takeFirst();
+
+    EXPECT_EQ(10u, deque->size());
+    i = 0;
+    for (const auto& intWrapper : *deque) {
+        EXPECT_EQ(50 + i, intWrapper->value());
+        i++;
+    }
+
+    // Append even more, eventually causing an expansion of the
+    // underlying buffer.
+    for (i = 0; i < 70; ++i)
+        deque->append(IntWrapper::create(60 + i));
+
+    EXPECT_EQ(80u, deque->size());
+    i = 0;
+    for (const auto& intWrapper : *deque) {
+        EXPECT_EQ(i + 50, intWrapper->value());
+        i++;
+    }
+}
+
 } // namespace blink